Improves geometry conversion performance

Introduces caching mechanisms for fragment IDs and geometry to avoid redundant processing, significantly enhancing geometry conversion speed. Adds methods to clear caches and retrieve statistics for performance monitoring and memory usage estimation. Handles COM exceptions and invalid operations more gracefully, preventing crashes and improving stability.
Adds COM object lifetime management utility
2025-11-15 18:03:36 +00:00 · 2025-11-15 18:03:17 +00:00 · 2025-11-14 19:11:16 +03:00 · 2025-11-14 18:33:32 +03:00 · 2025-11-14 16:41:58 +03:00 · 2025-11-14 14:48:31 +03:00
117 changed files with 2610 additions and 1464 deletions
@@ -259,9 +259,9 @@
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@@ -346,18 +346,18 @@
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      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -367,14 +367,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -268,9 +268,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -302,7 +302,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.DependencyInjection": {
@@ -346,18 +346,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -367,14 +367,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -219,9 +219,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -254,7 +254,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.DependencyInjection": {
@@ -298,18 +298,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -317,14 +317,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    "net8.0-windows7.0/win-x64": {
@@ -219,9 +219,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -254,7 +254,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.DependencyInjection": {
@@ -298,18 +298,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -317,14 +317,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    "net8.0-windows7.0/win-x64": {
@@ -153,7 +153,7 @@ public class CsiRootObjectBuilder : IRootObjectBuilder<ICsiWrapper>
          requestedResultTypes,
          objectSelectionSummary
        );
-        rootObjectCollection["analysisResults"] = analysisResults;
+        rootObjectCollection[RootKeys.ANALYSIS_RESULTS] = analysisResults;
      }
      catch (Exception ex)
      {
@@ -259,9 +259,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -285,7 +285,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.etabs21": {
@@ -335,18 +335,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -356,14 +356,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -210,9 +210,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -236,7 +236,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.etabs22": {
@@ -286,18 +286,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -305,14 +305,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -259,9 +259,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -285,7 +285,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.navisworks2020": {
@@ -337,18 +337,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
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        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    ".NETFramework,Version=v4.8/win-x64": {
@@ -16,6 +16,7 @@ using Speckle.Connectors.DUI.Models;
 using Speckle.Connectors.DUI.Models.Card.SendFilter;
 using Speckle.Connectors.DUI.WebView;
 using Speckle.Converter.Navisworks.Settings;
+using Speckle.Converter.Navisworks.Services;
 using Speckle.Converters.Common;
 using Speckle.Sdk.Models.GraphTraversal;

@@ -52,6 +53,9 @@ public static class NavisworksConnectorServiceRegistration
    serviceCollection.AddScoped<NavisworksMaterialUnpacker>();
    serviceCollection.AddScoped<NavisworksColorUnpacker>();

+    // Register dual shared geometry stores for instancing pattern
+    serviceCollection.AddScoped<InstanceStoreManager>();
+
    serviceCollection.AddSingleton<IAppIdleManager, NavisworksIdleManager>();

    // Sending operations
@@ -1,7 +1,10 @@
+using Autodesk.Navisworks.Api.ComApi;
+using Autodesk.Navisworks.Api.Interop.ComApi;
 using Microsoft.Extensions.Logging;
 using Speckle.Connector.Navisworks.Services;
 using Speckle.Converter.Navisworks.Helpers;
 using Speckle.Converter.Navisworks.Settings;
+using Speckle.Converter.Navisworks.ToSpeckle;
 using Speckle.Converters.Common;
 using Speckle.Objects.Other;
 using Speckle.Sdk;
@@ -11,7 +14,8 @@ namespace Speckle.Connector.Navisworks.HostApp;
 public class NavisworksMaterialUnpacker(
  ILogger<NavisworksMaterialUnpacker> logger,
  IConverterSettingsStore<NavisworksConversionSettings> converterSettings,
-  IElementSelectionService selectionService
+  IElementSelectionService selectionService,
+  GeometryToSpeckleConverter converter
 )
 {
  // Helper function to select a property based on the representation mode
@@ -64,6 +68,19 @@ public class NavisworksMaterialUnpacker(

        var navisworksObjectId = selectionService.GetModelItemPath(navisworksObject);
        var finalId = mergedIds.TryGetValue(navisworksObjectId, out var mergedId) ? mergedId : navisworksObjectId;
+
+        var item = selectionService.GetModelItemFromPath(finalId);
+        string hashId = "";
+        var comSelection = ComApiBridge.ToInwOpSelection([item]);
+        var paths = comSelection.Paths();
+        var path = paths.OfType<InwOaPath>().First();
+        var fragments = path.Fragments();
+        if (fragments.Count > 1)
+        {
+          var fragmentId = converter.GenerateFragmentId(paths);
+          hashId = $"geom_{fragmentId}";
+        }
+
        var geometry = navisworksObject.Geometry;
        var mode = converterSettings.Current.User.VisualRepresentationMode;

@@ -120,7 +137,7 @@ public class NavisworksMaterialUnpacker(

        if (renderMaterialProxies.TryGetValue(renderMaterialId.ToString(), out RenderMaterialProxy? value))
        {
-          value.objects.Add(finalId);
+          value.objects.Add(!string.IsNullOrEmpty(hashId) ? hashId : finalId);
        }
        else
        {
@@ -132,7 +149,7 @@ public class NavisworksMaterialUnpacker(
              renderColor,
              renderMaterialId
            ),
-            objects = [finalId]
+            objects = [!string.IsNullOrEmpty(hashId) ? hashId : finalId]
          };
        }
      }
@@ -6,6 +6,7 @@ using Speckle.Connectors.Common.Caching;
 using Speckle.Connectors.Common.Conversion;
 using Speckle.Connectors.Common.Operations;
 using Speckle.Converter.Navisworks.Helpers;
+using Speckle.Converter.Navisworks.Services;
 using Speckle.Converter.Navisworks.Settings;
 using Speckle.Converters.Common;
 using Speckle.Objects.Data;
@@ -25,7 +26,8 @@ public class NavisworksRootObjectBuilder(
  ISdkActivityFactory activityFactory,
  NavisworksMaterialUnpacker materialUnpacker,
  NavisworksColorUnpacker colorUnpacker,
-  IElementSelectionService elementSelectionService
+  IElementSelectionService elementSelectionService,
+  InstanceStoreManager instanceStoreManager
 ) : IRootObjectBuilder<NAV.ModelItem>
 {
  private bool SkipNodeMerging { get; set; }
@@ -41,7 +43,7 @@ public class NavisworksRootObjectBuilder(
  {
 #if DEBUG
    // This is a temporary workaround to disable node merging for debugging purposes - false is default, true is for debugging
-    SkipNodeMerging = false;
+    SkipNodeMerging = true;
 #endif
    using var activity = activityFactory.Start("Build");

@@ -50,22 +52,42 @@ public class NavisworksRootObjectBuilder(
    // 2. Initialize root collection
    var rootCollection = InitializeRootCollection();

+    // InstanceStoreManager is scoped - starts fresh for each conversion session
+
    // 3. Convert all model items and store results
-    var (convertedElements, conversionResults) = await ConvertModelItemsAsync(
-      navisworksModelItems,
-      projectId,
-      onOperationProgressed,
-      cancellationToken
-    );
+    (Dictionary<string, Base?> convertedElements, List<SendConversionResult> conversionResults) =
+      await ConvertModelItemsAsync(navisworksModelItems, projectId, onOperationProgressed, cancellationToken);

    ValidateConversionResults(conversionResults);

    var groupedNodes = SkipNodeMerging ? [] : GroupSiblingGeometryNodes(navisworksModelItems);
    var finalElements = BuildFinalElements(convertedElements, groupedNodes);
+    List<Base> geometryDefinitions = instanceStoreManager.GetGeometryDefinitions();

    await AddProxiesToCollection(rootCollection, navisworksModelItems, groupedNodes);

-    rootCollection.elements = finalElements;
+    // rootCollection.elements will contain two Collections: one for geometry definitions and one for the main elements
+
+    var geometryDefinitionsCollection = new Collection
+    {
+      name = "Geometry Definitions",
+      ["units"] = converterSettings.Current.Derived.SpeckleUnits,
+      elements = geometryDefinitions
+    };
+
+    var mainElementsCollection = new Collection
+    {
+      name = rootCollection.name,
+      ["units"] = converterSettings.Current.Derived.SpeckleUnits,
+      elements = finalElements
+    };
+
+    rootCollection.elements = [mainElementsCollection];
+    if (geometryDefinitions.Count > 0)
+    {
+      rootCollection.elements.Add(geometryDefinitionsCollection);
+    }
+
    return new RootObjectBuilderResult(rootCollection, conversionResults);
  }

@@ -288,6 +310,24 @@ public class NavisworksRootObjectBuilder(
      rootCollection[ProxyKeys.COLOR] = colors;
    }

+    // Add instance definition proxies from dual store
+    var instanceDefinitionProxies = instanceStoreManager.GetInstanceDefinitionProxies();
+    logger.LogDebug("Retrieved {Count} instance definition proxies from store", instanceDefinitionProxies.Count);
+
+    if (instanceDefinitionProxies.Count > 0)
+    {
+      rootCollection[ProxyKeys.INSTANCE_DEFINITION] = instanceDefinitionProxies.ToList();
+      logger.LogDebug(
+        "Added {Count} instance definition proxies to root collection under key '{Key}'",
+        instanceDefinitionProxies.Count,
+        ProxyKeys.INSTANCE_DEFINITION
+      );
+    }
+    else
+    {
+      logger.LogDebug("No instance definition proxies to add to root collection");
+    }
+
    return Task.CompletedTask;
  }

@@ -281,9 +281,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -306,7 +306,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.revit2022": {
@@ -351,11 +351,11 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Revit.API": {
@@ -366,9 +366,9 @@
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -378,14 +378,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -281,9 +281,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -306,7 +306,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.revit2023": {
@@ -351,11 +351,11 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Revit.API": {
@@ -366,9 +366,9 @@
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -378,14 +378,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -281,9 +281,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -306,7 +306,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.revit2024": {
@@ -351,11 +351,11 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Revit.API": {
@@ -366,9 +366,9 @@
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -378,14 +378,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -226,9 +226,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -251,7 +251,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.revit2025": {
@@ -296,11 +296,11 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Revit.API": {
@@ -311,9 +311,9 @@
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -321,14 +321,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    "net8.0-windows7.0/win-x64": {
@@ -219,9 +219,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -244,7 +244,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.revit2026": {
@@ -280,11 +280,11 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Revit.API": {
@@ -295,9 +295,9 @@
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -305,14 +305,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    "net8.0-windows7.0/win-x64": {
@@ -66,8 +66,8 @@ public sealed class RevitHostObjectBuilder(
    // TODO: formalise getting transform info from rootObject. this dict access is gross.
    Autodesk.Revit.DB.Transform? referencePointTransformFromRootObject = null;
    if (
-      rootObject.DynamicPropertyKeys.Contains(ReferencePointHelper.REFERENCE_POINT_TRANSFORM_KEY)
-      && rootObject[ReferencePointHelper.REFERENCE_POINT_TRANSFORM_KEY] is Dictionary<string, object> transformDict
+      rootObject.DynamicPropertyKeys.Contains(RootKeys.REFERENCE_POINT_TRANSFORM)
+      && rootObject[RootKeys.REFERENCE_POINT_TRANSFORM] is Dictionary<string, object> transformDict
      && transformDict.TryGetValue("transform", out var transformValue)
    )
    {
@@ -267,7 +267,7 @@ public class RevitRootObjectBuilder(
    if (converterSettings.Current.ReferencePointTransform is Transform transform)
    {
      var transformMatrix = ReferencePointHelper.CreateTransformDataForRootObject(transform);
-      rootObject[ReferencePointHelper.REFERENCE_POINT_TRANSFORM_KEY] = transformMatrix;
+      rootObject[RootKeys.REFERENCE_POINT_TRANSFORM] = transformMatrix;
    }

    return new RootObjectBuilderResult(rootObject, results);
@@ -325,9 +325,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.logging": {
@@ -337,7 +337,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.rhino7": {
@@ -382,18 +382,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -403,14 +403,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -325,9 +325,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.logging": {
@@ -337,7 +337,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.rhino8": {
@@ -381,18 +381,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -402,14 +402,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -162,6 +162,7 @@ public class CreateSpeckleProperties : VariableParameterComponentBase
      Params.RegisterInputParam(param);
    }

+    Params.OnParametersChanged();
    ExpireSolution(true);
  }

@@ -47,15 +47,13 @@ public class ReceiveAsyncComponent : GH_AsyncComponent<ReceiveAsyncComponent>
  public bool JustPastedIn { get; set; }
  public string LastVersionDate { get; set; }
  public string LastInfoMessage { get; set; }
-  public HostApp.SpeckleUrlModelResource? UrlModelResource { get; set; }
+  public SpeckleUrlModelResource? UrlModelResource { get; set; }

  // DI props
  public IClient ApiClient { get; private set; }

-  protected override void RegisterInputParams(GH_InputParamManager pManager)
-  {
+  protected override void RegisterInputParams(GH_InputParamManager pManager) =>
    pManager.AddParameter(new SpeckleUrlModelResourceParam(GH_ParamAccess.item));
-  }

  protected override void RegisterOutputParams(GH_OutputParamManager pManager)
  {
@@ -66,6 +64,14 @@ public class ReceiveAsyncComponent : GH_AsyncComponent<ReceiveAsyncComponent>
      "The model collection of the loaded version",
      GH_ParamAccess.item
    );
+
+    pManager.AddParameter(
+      new SpecklePropertyGroupParam(),
+      "Properties",
+      "properties",
+      "Model-wide properties from the root collection",
+      GH_ParamAccess.item
+    );
  }

  protected override void SolveInstance(IGH_DataAccess da)
@@ -285,7 +291,7 @@ public class ReceiveAsyncComponent : GH_AsyncComponent<ReceiveAsyncComponent>
      Account? account = urlResource.Account.GetAccount(scope);
      if (account is null)
      {
-        throw new SpeckleAccountManagerException($"No default account was found");
+        throw new SpeckleAccountManagerException("No default account was found");
      }

      ApiClient?.Dispose();
@@ -338,6 +344,7 @@ public sealed class ReceiveComponentWorker : WorkerInstance<ReceiveAsyncComponen
  public Base Root { get; set; }
  public SpeckleUrlModelResource? UrlModelResource { get; set; }
  public SpeckleCollectionWrapperGoo Result { get; set; }
+  public SpecklePropertyGroupGoo? RootProperties { get; private set; }
  private List<(GH_RuntimeMessageLevel, string)> RuntimeMessages { get; } = new();

  public override WorkerInstance<ReceiveAsyncComponent> Duplicate(string id, CancellationToken cancellationToken)
@@ -374,6 +381,7 @@ public sealed class ReceiveComponentWorker : WorkerInstance<ReceiveAsyncComponen
    }

    da.SetData(0, Result);
+    da.SetData(1, RootProperties);
  }

  public override async Task DoWork(Action<string, double> reportProgress, Action done)
@@ -446,6 +454,12 @@ public sealed class ReceiveComponentWorker : WorkerInstance<ReceiveAsyncComponen

    CancellationToken.ThrowIfCancellationRequested();

+    SpecklePropertyGroupGoo? rootPropertiesGoo = null;
+    if (Root is RootCollection rootCollection && rootCollection.properties.Count > 0)
+    {
+      rootPropertiesGoo = new SpecklePropertyGroupGoo(rootCollection.properties);
+    }
+
    // Step 2 - CONVERT
    //receiveComponent.Message = $"Unpacking...";
    TraversalContextUnpacker traversalContextUnpacker = new();
@@ -481,6 +495,7 @@ public sealed class ReceiveComponentWorker : WorkerInstance<ReceiveAsyncComponen
    mapHandler.ConvertBlockInstances(blockInstances, unpackedRoot.DefinitionProxies);

    Result = new SpeckleCollectionWrapperGoo(collectionRebuilder.RootCollectionWrapper);
+    RootProperties = rootPropertiesGoo;

    // TODO: If we have NodeRun events later, better to have `ComponentTracker` to use across components
    var customProperties = new Dictionary<string, object>()
@@ -37,6 +37,7 @@ public class ReceiveComponentOutput
  /// Made nullable as output can be null when Run = false or on error
  /// </remarks>
  public SpeckleCollectionWrapperGoo? RootObject { get; set; }
+  public SpecklePropertyGroupGoo? RootProperties { get; set; }
 }

 public class ReceiveComponent : SpeckleTaskCapableComponent<ReceiveComponentInput, ReceiveComponentOutput>
@@ -71,6 +72,14 @@ public class ReceiveComponent : SpeckleTaskCapableComponent<ReceiveComponentInpu
      "The model collection of the loaded version",
      GH_ParamAccess.item
    );
+
+    pManager.AddParameter(
+      new SpecklePropertyGroupParam(),
+      "Properties",
+      "properties",
+      "Model-wide properties from the root collection",
+      GH_ParamAccess.item
+    );
  }

  protected override ReceiveComponentInput GetInput(IGH_DataAccess da)
@@ -106,6 +115,8 @@ public class ReceiveComponent : SpeckleTaskCapableComponent<ReceiveComponentInpu
    else
    {
      da.SetData(0, result.RootObject);
+      da.SetData(1, result.RootProperties);
+
      Message = _apiClient != null ? "Loaded" : "Done";
    }
  }
@@ -140,7 +151,7 @@ public class ReceiveComponent : SpeckleTaskCapableComponent<ReceiveComponentInpu
    Account? account = input.Resource.Account.GetAccount(scope);
    if (account is null)
    {
-      throw new SpeckleAccountManagerException($"No default account was found");
+      throw new SpeckleAccountManagerException("No default account was found");
    }

    using var client = clientFactory.Create(account);
@@ -159,8 +170,15 @@ public class ReceiveComponent : SpeckleTaskCapableComponent<ReceiveComponentInpu
      .ReceiveCommitObject(receiveInfo, progress, cancellationToken)
      .ConfigureAwait(false);

+    // extract model-wide root properties (see cnx-2722)
+    SpecklePropertyGroupGoo? rootPropertiesGoo = null;
+    if (root is RootCollection rootCollection && rootCollection.properties.Count > 0)
+    {
+      rootPropertiesGoo = new SpecklePropertyGroupGoo(rootCollection.properties);
+    }
+
    // TODO: If we have NodeRun events later, better to have `ComponentTracker` to use across components
-    var customProperties = new Dictionary<string, object>()
+    var customProperties = new Dictionary<string, object>
    {
      { "isAsync", false },
      { "sourceHostApp", HostApplications.GetSlugFromHostAppNameAndVersion(receiveInfo.SourceApplication) }
@@ -213,7 +231,7 @@ public class ReceiveComponent : SpeckleTaskCapableComponent<ReceiveComponentInpu

    // var x = new SpeckleCollectionGoo { Value = collGen.RootCollection };
    var goo = new SpeckleCollectionWrapperGoo(collectionRebuilder.RootCollectionWrapper);
-    return new ReceiveComponentOutput { RootObject = goo };
+    return new ReceiveComponentOutput { RootObject = goo, RootProperties = rootPropertiesGoo };
  }

  private void SetupSubscription(SpeckleUrlModelResource resource)
@@ -51,6 +51,7 @@ public class SendAsyncComponent : GH_AsyncComponent<SendAsyncComponent>
  public IClient ApiClient { get; set; }
  public HostApp.SpeckleUrlModelResource? UrlModelResource { get; set; }
  public SpeckleCollectionWrapperGoo? RootCollectionWrapper { get; set; }
+  public SpecklePropertyGroupGoo? RootProperties { get; private set; }
  public SpeckleUrlModelResource? OutputParam { get; set; }
  public bool HasMultipleInputs { get; set; }

@@ -58,7 +59,10 @@ public class SendAsyncComponent : GH_AsyncComponent<SendAsyncComponent>

  protected override void RegisterInputParams(GH_InputParamManager pManager)
  {
+    // speckle model
    pManager.AddParameter(new SpeckleUrlModelResourceParam());
+
+    // collection
    pManager.AddParameter(
      new SpeckleCollectionParam(GH_ParamAccess.item),
      "Collection",
@@ -68,6 +72,16 @@ public class SendAsyncComponent : GH_AsyncComponent<SendAsyncComponent>
    );
    pManager.AddTextParameter("Version Message", "versionMessage", "The version message", GH_ParamAccess.item);
    pManager[2].Optional = true;
+
+    // model-wide props (see cnx-2722)
+    pManager.AddParameter(
+      new SpecklePropertyGroupParam(),
+      "Properties",
+      "properties",
+      "Optional model-wide properties to attach to the root collection",
+      GH_ParamAccess.item
+    );
+    pManager[3].Optional = true;
  }

  protected override void RegisterOutputParams(GH_OutputParamManager pManager)
@@ -280,6 +294,19 @@ public class SendAsyncComponent : GH_AsyncComponent<SendAsyncComponent>
    string? versionMessage = null;
    da.GetData(2, ref versionMessage);
    VersionMessage = versionMessage;
+
+    SpecklePropertyGroupGoo? rootPropsGoo = null;
+    da.GetData(3, ref rootPropsGoo);
+
+    // validate single properties group
+    // we can't support a list input here, what does that even mean? grafting the collection to each props entry?? scary.
+    if (Params.Input[3].VolatileData.DataCount > 1)
+    {
+      AddRuntimeMessage(GH_RuntimeMessageLevel.Error, "Only one Model Properties group is allowed");
+      return;
+    }
+
+    RootProperties = rootPropsGoo;
  }
 }

@@ -395,6 +422,13 @@ public class SendComponentWorker : WorkerInstance<SendAsyncComponent>
      throw new InvalidOperationException("Root Collection was null");
    }

+    // safe to always create new wrapper since users cannot create SpeckleRootCollectionWrapper directly - it's only
+    // constructed here from the Collection + Model Properties inputs.
+    // if this changes, then we need to update below!
+    var rootWrapper = new SpeckleRootCollectionWrapper(rootCollectionWrapper.Value, Parent.RootProperties?.Unwrap());
+
+    rootCollectionWrapper = new SpeckleRootCollectionWrapperGoo(rootWrapper);
+
    // Step 1 - SEND TO SERVER
    var sendInfo = await urlModelResource.GetSendInfo(Parent.ApiClient, CancellationToken).ConfigureAwait(false);

@@ -408,7 +442,7 @@ public class SendComponentWorker : WorkerInstance<SendAsyncComponent>
    var sendOperation = scope.ServiceProvider.GetRequiredService<SendOperation<SpeckleCollectionWrapperGoo>>();
    SendOperationResult? result = await sendOperation
      .Execute(
-        new List<SpeckleCollectionWrapperGoo>() { rootCollectionWrapper },
+        new List<SpeckleCollectionWrapperGoo> { rootCollectionWrapper },
        sendInfo,
        Parent.VersionMessage,
        progress,
@@ -20,12 +20,19 @@ public class SendComponentInput
  public SpeckleUrlModelResource Resource { get; }
  public SpeckleCollectionWrapperGoo Input { get; }
  public bool Run { get; }
+  public SpecklePropertyGroupGoo? RootProperties { get; }

-  public SendComponentInput(SpeckleUrlModelResource resource, SpeckleCollectionWrapperGoo input, bool run)
+  public SendComponentInput(
+    SpeckleUrlModelResource resource,
+    SpeckleCollectionWrapperGoo input,
+    bool run,
+    SpecklePropertyGroupGoo? rootProperties
+  )
  {
    Resource = resource;
    Input = input;
    Run = run;
+    RootProperties = rootProperties;
  }
 }

@@ -36,6 +43,11 @@ public class SendComponentOutput(SpeckleUrlModelResource? resource)

 public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, SendComponentOutput>
 {
+  public override Guid ComponentGuid => new("0CF0D173-BDF0-4AC2-9157-02822B90E9FB");
+  public string? Url { get; private set; }
+  public string? VersionMessage { get; private set; }
+  protected override Bitmap Icon => Resources.speckle_operations_syncpublish;
+
  public SendComponent()
    : base(
      "(Sync) Publish",
@@ -45,17 +57,12 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
      ComponentCategories.DEVELOPER
    ) { }

-  public override Guid ComponentGuid => new("0CF0D173-BDF0-4AC2-9157-02822B90E9FB");
-
-  public string? Url { get; private set; }
-
-  public string? VersionMessage { get; private set; }
-
-  protected override Bitmap Icon => Resources.speckle_operations_syncpublish;
-
  protected override void RegisterInputParams(GH_InputParamManager pManager)
  {
+    // speckle model
    pManager.AddParameter(new SpeckleUrlModelResourceParam());
+
+    // collection
    pManager.AddParameter(
      new SpeckleCollectionParam(GH_ParamAccess.item),
      "Collection",
@@ -65,13 +72,22 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
    );
    pManager.AddTextParameter("Version Message", "versionMessage", "The version message", GH_ParamAccess.item);
    pManager[2].Optional = true;
+
+    // model-wide props (see cnx-2722)
+    pManager.AddParameter(
+      new SpecklePropertyGroupParam(),
+      "Properties",
+      "properties",
+      "Optional model-wide properties to attach to the root collection",
+      GH_ParamAccess.item
+    );
+    pManager[3].Optional = true;
+
    pManager.AddBooleanParameter("Run", "r", "Run the publish operation", GH_ParamAccess.item);
  }

-  protected override void RegisterOutputParams(GH_OutputParamManager pManager)
-  {
+  protected override void RegisterOutputParams(GH_OutputParamManager pManager) =>
    pManager.AddParameter(new SpeckleUrlModelResourceParam());
-  }

  protected override SendComponentInput GetInput(IGH_DataAccess da)
  {
@@ -93,10 +109,20 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
    da.GetData(2, ref versionMessage);
    VersionMessage = versionMessage;

-    bool run = false;
-    da.GetData(3, ref run);
+    SpecklePropertyGroupGoo? rootPropsGoo = null;
+    da.GetData(3, ref rootPropsGoo);

-    return new SendComponentInput(resource.NotNull(), rootCollectionWrapper, run);
+    // validate single properties group
+    // we can't support a list input here, what does that even mean? grafting the collection to each props entry?? scary.
+    if (Params.Input[3].VolatileData.DataCount > 1)
+    {
+      throw new SpeckleException("Only one Model Properties group is allowed");
+    }
+
+    bool run = false;
+    da.GetData(4, ref run);
+
+    return new SendComponentInput(resource.NotNull(), rootCollectionWrapper, run, rootPropsGoo);
  }

  protected override void SetOutput(IGH_DataAccess da, SendComponentOutput result)
@@ -121,7 +147,7 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
    {
      Menu_AppendSeparator(menu);

-      Menu_AppendItem(menu, $"View created model online ↗", (s, e) => Open(Url));
+      Menu_AppendItem(menu, "View created model online ↗", (s, e) => Open(Url));
    }

    static void Open(string url)
@@ -166,6 +192,12 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
      return new(null);
    }

+    // safe to always create new wrapper since users cannot create SpeckleRootCollectionWrapper directly - it's only
+    // constructed here from the Collection + Model Properties inputs.
+    // if this changes, then we need to update below!
+    var rootWrapper = new SpeckleRootCollectionWrapper(input.Input.Value, input.RootProperties?.Unwrap());
+    var collectionToSend = new SpeckleRootCollectionWrapperGoo(rootWrapper);
+
    using var scope = PriorityLoader.CreateScopeForActiveDocument();
    var clientFactory = scope.ServiceProvider.GetRequiredService<IClientFactory>();
    var sendOperation = scope.ServiceProvider.GetRequiredService<SendOperation<SpeckleCollectionWrapperGoo>>();
@@ -173,7 +205,7 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
    Account? account = input.Resource.Account.GetAccount(scope);
    if (account is null)
    {
-      throw new SpeckleAccountManagerException($"No default account was found");
+      throw new SpeckleAccountManagerException("No default account was found");
    }

    var progress = new Progress<CardProgress>(_ =>
@@ -186,7 +218,7 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
    var sendInfo = await input.Resource.GetSendInfo(client, cancellationToken).ConfigureAwait(false);
    await sendOperation
      .Execute(
-        new List<SpeckleCollectionWrapperGoo>() { input.Input },
+        new List<SpeckleCollectionWrapperGoo> { collectionToSend },
        sendInfo,
        VersionMessage,
        progress,
@@ -195,7 +227,7 @@ public class SendComponent : SpeckleTaskCapableComponent<SendComponentInput, Sen
      .ConfigureAwait(false);

    // TODO: If we have NodeRun events later, better to have `ComponentTracker` to use across components
-    var customProperties = new Dictionary<string, object>() { { "isAsync", false } };
+    var customProperties = new Dictionary<string, object> { { "isAsync", false } };
    if (sendInfo.WorkspaceId != null)
    {
      customProperties.Add("workspace_id", sendInfo.WorkspaceId);
@@ -35,9 +35,15 @@ public class GrasshopperRootObjectBuilder : IRootObjectBuilder<SpeckleCollection
    CancellationToken ct = default
  )
  {
-    // deep copy input (to not mutate input) and set the input collection name to "Grasshopper Model"
-    var inputCollectionGoo = (SpeckleCollectionWrapperGoo)input[0].Duplicate();
-    inputCollectionGoo.Value.Name = "Grasshopper Model";
+    // create root collection
+    var rootCollectionGoo = (SpeckleRootCollectionWrapperGoo)input[0].Duplicate();
+    rootCollectionGoo.Value.Name = "Grasshopper Model";
+    RootCollection rootCollection =
+      new(rootCollectionGoo.Value.Name)
+      {
+        applicationId = rootCollectionGoo.Value.ApplicationId,
+        properties = rootCollectionGoo.Value.Properties ?? new()
+      };

    // create packers for colors and render materials
    GrasshopperColorPacker colorPacker = new();
@@ -45,15 +51,15 @@ public class GrasshopperRootObjectBuilder : IRootObjectBuilder<SpeckleCollection
    GrasshopperBlockPacker blockPacker = new(_instanceObjectsManager);

    // unwrap the input collection to remove all wrappers
-    Collection root = Unwrap(inputCollectionGoo.Value, colorPacker, materialPacker, blockPacker);
+    Unwrap(rootCollectionGoo.Value, rootCollection, colorPacker, materialPacker, blockPacker);

    // add proxies
-    root[ProxyKeys.COLOR] = colorPacker.ColorProxies.Values.ToList();
-    root[ProxyKeys.RENDER_MATERIAL] = materialPacker.RenderMaterialProxies.Values.ToList();
-    root[ProxyKeys.INSTANCE_DEFINITION] = blockPacker.InstanceDefinitionProxies.Values.ToList();
+    rootCollection[ProxyKeys.COLOR] = colorPacker.ColorProxies.Values.ToList();
+    rootCollection[ProxyKeys.RENDER_MATERIAL] = materialPacker.RenderMaterialProxies.Values.ToList();
+    rootCollection[ProxyKeys.INSTANCE_DEFINITION] = blockPacker.InstanceDefinitionProxies.Values.ToList();

    // TODO: Not getting any conversion results yet
-    var result = new RootObjectBuilderResult(root, []);
+    var result = new RootObjectBuilderResult(rootCollection, []);

    return Task.FromResult(result);
  }
@@ -62,13 +68,12 @@ public class GrasshopperRootObjectBuilder : IRootObjectBuilder<SpeckleCollection
  // Also packs colors, render materials and block definitions into proxies while unwrapping.
  private Collection Unwrap(
    SpeckleCollectionWrapper wrapper,
+    Collection targetCollection,
    GrasshopperColorPacker colorPacker,
    GrasshopperMaterialPacker materialPacker,
    GrasshopperBlockPacker blockPacker
  )
  {
-    Collection currentColl = wrapper.Collection;
-
    // unpack color, render material and block definitions
    colorPacker.ProcessColor(wrapper.ApplicationId, wrapper.Color);
    materialPacker.ProcessMaterial(wrapper.ApplicationId, wrapper.Material);
@@ -84,20 +89,20 @@ public class GrasshopperRootObjectBuilder : IRootObjectBuilder<SpeckleCollection
          collWrapper.ApplicationId ??= collWrapper.GetSpeckleApplicationId();

          // add to collection and continue unwrap
-          currentColl.elements.Add(collWrapper.Collection);
-          Unwrap(collWrapper, colorPacker, materialPacker, blockPacker);
+          targetCollection.elements.Add(collWrapper.Collection);
+          Unwrap(collWrapper, collWrapper.Collection, colorPacker, materialPacker, blockPacker);
          break;

        case SpeckleGeometryWrapper so: // handles both SpeckleObjectWrapper and SpeckleBlockInstanceWrapper (inheritance)
          // convert wrapper to base and add to collection - common for all object wrappers
          Base objectBase = UnwrapGeometry(so);
          string applicationId = objectBase.applicationId!;
-          currentColl.elements.Add(objectBase);
+          targetCollection.elements.Add(objectBase);

          // do block instance specific stuff (if this object wrapper is actually a block instance)
          if (so is SpeckleBlockInstanceWrapper blockInstance)
          {
-            ProcessBlockInstanceDefinition(blockInstance, colorPacker, materialPacker, blockPacker, currentColl);
+            ProcessBlockInstanceDefinition(blockInstance, colorPacker, materialPacker, blockPacker, targetCollection);
          }

          // process color and material for all object wrappers (including block instances)
@@ -110,7 +115,7 @@ public class GrasshopperRootObjectBuilder : IRootObjectBuilder<SpeckleCollection
          // UnwrapDataObject will unwrap underlying geometry and handle color and material
          // arguably doing too much, but I'm apprehensive looping twice without good reason
          DataObject dataObject = UnwrapDataObject(dataObjectWrapper, colorPacker, materialPacker);
-          currentColl.elements.Add(dataObject);
+          targetCollection.elements.Add(dataObject);
          break;
      }
    }
@@ -127,7 +132,7 @@ public class GrasshopperRootObjectBuilder : IRootObjectBuilder<SpeckleCollection
    }
    */

-    return currentColl;
+    return targetCollection;
  }

  /// <summary>
@@ -0,0 +1,42 @@
+using System.Diagnostics.CodeAnalysis;
+
+namespace Speckle.Connectors.GrasshopperShared.Parameters;
+
+public class SpeckleRootCollectionWrapper : SpeckleCollectionWrapper
+{
+  public Dictionary<string, object?>? Properties { get; set; }
+
+  public SpeckleRootCollectionWrapper() { }
+
+  [SetsRequiredMembers]
+  public SpeckleRootCollectionWrapper(SpeckleCollectionWrapper wrapper, Dictionary<string, object?>? properties = null)
+  {
+    Base = wrapper.Base;
+    Color = wrapper.Color;
+    Material = wrapper.Material;
+    ApplicationId = wrapper.ApplicationId;
+    Name = wrapper.Name;
+    Path = wrapper.Path;
+    Topology = wrapper.Topology;
+    Elements = wrapper.Elements;
+    Properties = properties;
+  }
+
+  public new SpeckleRootCollectionWrapper DeepCopy()
+  {
+    // delegate most to SpeckleCollectionWrapper and we just copy result
+    SpeckleCollectionWrapper baseCopy = base.DeepCopy();
+    return new SpeckleRootCollectionWrapper
+    {
+      Base = baseCopy.Base,
+      Color = baseCopy.Color,
+      Material = baseCopy.Material,
+      ApplicationId = baseCopy.ApplicationId,
+      Name = baseCopy.Name,
+      Path = baseCopy.Path,
+      Topology = baseCopy.Topology,
+      Elements = baseCopy.Elements,
+      Properties = Properties != null ? new Dictionary<string, object?>(Properties) : null
+    };
+  }
+}
@@ -0,0 +1,20 @@
+using Grasshopper.Kernel.Types;
+
+namespace Speckle.Connectors.GrasshopperShared.Parameters;
+
+public class SpeckleRootCollectionWrapperGoo : SpeckleCollectionWrapperGoo
+{
+  public new SpeckleRootCollectionWrapper Value { get; set; }
+
+  public SpeckleRootCollectionWrapperGoo() { }
+
+  public SpeckleRootCollectionWrapperGoo(SpeckleRootCollectionWrapper value)
+    : base(value)
+  {
+    Value = value;
+  }
+
+  public override IGH_Goo Duplicate() => new SpeckleRootCollectionWrapperGoo(Value.DeepCopy());
+
+  public override string ToString() => Value?.ToString() ?? "Invalid Root Collection";
+}
@@ -90,6 +90,8 @@
    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleDataObjectWrapperParam.cs" />
    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleMaterialWrapperGoo.cs" />
    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleMaterialWrapperParam.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleRootCollectionWrapper.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleRootCollectionWrapperGoo.cs" />
    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleWrapper.cs" />
    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleMaterialWrapperGoo.ModelObjects.cs" />
    <Compile Include="$(MSBuildThisFileDirectory)Parameters\Wrappers\SpeckleMaterialWrapper.cs" />
@@ -306,9 +306,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -341,7 +341,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.rhino7": {
@@ -401,18 +401,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -422,14 +422,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      },
      "System.Resources.Extensions": {
        "type": "CentralTransitive",
@@ -306,9 +306,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -341,7 +341,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.rhino8": {
@@ -400,18 +400,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -421,14 +421,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      },
      "System.Resources.Extensions": {
        "type": "CentralTransitive",
@@ -235,9 +235,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -261,7 +261,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.rhino8": {
@@ -311,18 +311,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -330,14 +330,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    "net8.0-windows7.0/win-x64": {
@@ -83,7 +83,7 @@ public sealed class RhinoSendBinding : ISendBinding
    _sendOperationManagerFactory = sendOperationManagerFactory;
    _rhinoLayerHelper = rhinoLayerHelper;
    Commands = new SendBindingUICommands(parent); // POC: Commands are tightly coupled with their bindings, at least for now, saves us injecting a factory.
-    PreviousUnitSystem = RhinoDoc.ActiveDoc.ModelUnitSystem;
+    PreviousUnitSystem = RhinoDoc.ActiveDoc?.ModelUnitSystem ?? UnitSystem.None;
    SubscribeToRhinoEvents();
  }

@@ -1,5 +1,4 @@
 using Microsoft.Extensions.Logging;
-using Rhino;
 using Speckle.Converters.Common;
 using Speckle.Converters.Rhino;
 using Speckle.Objects.Other;
@@ -44,35 +43,43 @@ public class RhinoMaterialBaker
        string materialId = speckleRenderMaterial.applicationId ?? speckleRenderMaterial.id.NotNull();
        string matName = $"{speckleRenderMaterial.name}-({materialId})-{baseLayerName}";
        matName = matName.Replace("[", "").Replace("]", ""); // "Material" doesn't like square brackets if we create from here. Once they created from Rhino UI, all good..
-        Color diffuse = Color.FromArgb(speckleRenderMaterial.diffuse);
-        Color emissive = Color.FromArgb(speckleRenderMaterial.emissive);
-        double transparency = 1 - speckleRenderMaterial.opacity;

-        Material rhinoMaterial =
-          new()
-          {
-            Name = matName,
-            DiffuseColor = diffuse,
-            EmissionColor = emissive,
-            Transparency = transparency
-          };
+        // Check if material with this name already exists in the document
+        int matIndex = doc.Materials.Find(matName, ignoreDeletedMaterials: true);

-        // try to get additional properties
-        if (speckleRenderMaterial["ior"] is double ior)
-        {
-          rhinoMaterial.IndexOfRefraction = ior;
-        }
-        if (speckleRenderMaterial["shine"] is double shine)
-        {
-          rhinoMaterial.Shine = shine;
-        }
-
-        int matIndex = doc.Materials.Add(rhinoMaterial);
-
-        // POC: check on matIndex -1, means we haven't created anything - this is most likely an recoverable error at this stage
+        // If material doesn't exist, create it
        if (matIndex == -1)
        {
-          throw new ConversionException("Failed to add a material to the document.");
+          Color diffuse = Color.FromArgb(speckleRenderMaterial.diffuse);
+          Color emissive = Color.FromArgb(speckleRenderMaterial.emissive);
+          double transparency = 1 - speckleRenderMaterial.opacity;
+
+          Material rhinoMaterial =
+            new()
+            {
+              Name = matName,
+              DiffuseColor = diffuse,
+              EmissionColor = emissive,
+              Transparency = transparency
+            };
+
+          // try to get additional properties
+          if (speckleRenderMaterial["ior"] is double ior)
+          {
+            rhinoMaterial.IndexOfRefraction = ior;
+          }
+          if (speckleRenderMaterial["shine"] is double shine)
+          {
+            rhinoMaterial.Shine = shine;
+          }
+
+          matIndex = doc.Materials.Add(rhinoMaterial);
+
+          // POC: check on matIndex -1, means we haven't created anything - this is most likely an recoverable error at this stage
+          if (matIndex == -1)
+          {
+            throw new ConversionException($"Failed to add a material to the document: '{matName}' (ID: {materialId})");
+          }
        }

        // Create the object <> material index map
@@ -87,27 +94,4 @@ public class RhinoMaterialBaker
      }
    }
  }
-
-  /// <summary>
-  /// Removes all materials with a name starting with <paramref name="namePrefix"/> from the active document
-  /// </summary>
-  /// <param name="namePrefix"></param>
-  public void PurgeMaterials(string namePrefix)
-  {
-    var currentDoc = RhinoDoc.ActiveDoc; // POC: too much right now to interface around
-    foreach (Material material in currentDoc.Materials)
-    {
-      try
-      {
-        if (!material.IsDeleted && material.Name != null && material.Name.Contains(namePrefix))
-        {
-          currentDoc.Materials.Delete(material);
-        }
-      }
-      catch (Exception ex) when (!ex.IsFatal())
-      {
-        _logger.LogError(ex, "Failed to purge a material from the document");
-      }
-    }
-  }
 }
@@ -256,7 +256,8 @@ public class RhinoHostObjectBuilder : IHostObjectBuilder
      .RunOnMain(() =>
      {
        _instanceBaker.PurgeInstances(baseLayerName);
-        _materialBaker.PurgeMaterials(baseLayerName);
+        // Materials are now reused across receives instead of being purged
+        // _materialBaker.PurgeMaterials(baseLayerName);

        var doc = _converterSettings.Current.Document;
        // Cleans up any previously received objects
@@ -325,9 +325,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
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@@ -360,7 +360,7 @@
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@@ -410,18 +410,18 @@
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@@ -406,9 +406,9 @@
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@@ -441,7 +441,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
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@@ -491,18 +491,18 @@
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@@ -512,14 +512,14 @@
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@@ -406,9 +406,9 @@
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@@ -441,7 +441,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
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@@ -491,18 +491,18 @@
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@@ -512,14 +512,14 @@
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@@ -258,7 +258,7 @@
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@@ -287,18 +287,18 @@
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@@ -308,14 +308,14 @@
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@@ -258,7 +258,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
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@@ -287,18 +287,18 @@
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@@ -308,14 +308,14 @@
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@@ -259,9 +259,9 @@
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@@ -285,7 +285,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
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@@ -329,18 +329,18 @@
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@@ -350,14 +350,14 @@
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@@ -210,9 +210,9 @@
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@@ -236,7 +236,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
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@@ -280,18 +280,18 @@
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@@ -299,14 +299,14 @@
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@@ -210,9 +210,9 @@
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@@ -236,7 +236,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
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@@ -280,18 +280,18 @@
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@@ -299,14 +299,14 @@
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@@ -258,7 +258,7 @@
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@@ -287,18 +287,18 @@
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@@ -308,14 +308,14 @@
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@@ -209,7 +209,7 @@
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@@ -238,18 +238,18 @@
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@@ -257,14 +257,14 @@
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@@ -267,7 +267,7 @@
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@@ -296,18 +296,18 @@
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@@ -317,14 +317,14 @@
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@@ -267,7 +267,7 @@
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@@ -296,18 +296,18 @@
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@@ -317,14 +317,14 @@
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@@ -267,7 +267,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
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@@ -296,18 +296,18 @@
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@@ -317,14 +317,14 @@
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@@ -219,9 +219,9 @@
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@@ -245,7 +245,7 @@
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-          "Speckle.Objects": "[3.5.4, )"
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@@ -289,18 +289,18 @@
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@@ -308,14 +308,14 @@
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@@ -219,9 +219,9 @@
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@@ -245,7 +245,7 @@
        "type": "Project",
        "dependencies": {
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-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
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      "Microsoft.Extensions.DependencyInjection": {
@@ -289,18 +289,18 @@
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        "dependencies": {
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+          "Speckle.Sdk": "3.9.0"
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        "dependencies": {
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@@ -308,14 +308,14 @@
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          "Speckle.DoubleNumerics": "4.1.0",
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      }
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@@ -259,9 +259,9 @@
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-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
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+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
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      "speckle.connectors.dui": {
@@ -278,7 +278,7 @@
        "type": "Project",
        "dependencies": {
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-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
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      "Microsoft.Extensions.DependencyInjection": {
@@ -316,18 +316,18 @@
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        "dependencies": {
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+          "Speckle.Sdk": "3.9.0"
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        "dependencies": {
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@@ -337,14 +337,14 @@
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          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
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+        "requested": "[3.9.0, )",
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      }
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@@ -259,9 +259,9 @@
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-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
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+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
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      "speckle.connectors.dui": {
@@ -278,7 +278,7 @@
        "type": "Project",
        "dependencies": {
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-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
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      "Microsoft.Extensions.DependencyInjection": {
@@ -316,18 +316,18 @@
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        "dependencies": {
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@@ -337,14 +337,14 @@
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          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
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      }
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@@ -259,9 +259,9 @@
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-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
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+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
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      "speckle.connectors.dui": {
@@ -278,7 +278,7 @@
        "type": "Project",
        "dependencies": {
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-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
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      "Microsoft.Extensions.DependencyInjection": {
@@ -316,18 +316,18 @@
      },
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        "dependencies": {
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@@ -337,14 +337,14 @@
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          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
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+        "requested": "[3.9.0, )",
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@@ -259,9 +259,9 @@
        "dependencies": {
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-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
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+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -278,7 +278,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.DependencyInjection": {
@@ -316,18 +316,18 @@
      },
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+        "resolved": "3.9.0",
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        "dependencies": {
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+          "Speckle.Sdk": "3.9.0"
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+        "resolved": "3.9.0",
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@@ -337,14 +337,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
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+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
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@@ -259,9 +259,9 @@
        "dependencies": {
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-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
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+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -278,7 +278,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.DependencyInjection": {
@@ -316,18 +316,18 @@
      },
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        "dependencies": {
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+          "Speckle.Sdk": "3.9.0"
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@@ -337,14 +337,14 @@
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          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
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+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
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@@ -259,9 +259,9 @@
        "dependencies": {
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-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
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+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -278,7 +278,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.DependencyInjection": {
@@ -316,18 +316,18 @@
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+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -337,14 +337,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -260,9 +260,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -279,7 +279,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.DependencyInjection": {
@@ -317,18 +317,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -338,14 +338,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -1,38 +1,19 @@
-using Microsoft.Extensions.Logging;
-using Speckle.Converter.Navisworks.Settings;
-using Speckle.Converters.Common;
-using Speckle.Sdk.Models;
+using Speckle.Sdk.Models;
 using static Speckle.Converter.Navisworks.Helpers.ElementSelectionHelper;

 namespace Speckle.Converter.Navisworks.ToSpeckle;

-public class DisplayValueExtractor
+public class DisplayValueExtractor(GeometryToSpeckleConverter geometryConverter)
 {
-  private readonly IConverterSettingsStore<NavisworksConversionSettings> _converterSettings;
-  private readonly ILogger<DisplayValueExtractor> _logger;
-  private readonly GeometryToSpeckleConverter _geometryConverter;
-
-  public DisplayValueExtractor(
-    IConverterSettingsStore<NavisworksConversionSettings> converterSettings,
-    ILogger<DisplayValueExtractor> logger
-  )
-  {
-    _converterSettings = converterSettings;
-    _logger = logger;
-    _geometryConverter = new GeometryToSpeckleConverter(_converterSettings.Current);
-  }
-
-  internal List<Base> GetDisplayValue(NAV.ModelItem modelItem)
-  {
-    if (modelItem == null)
-    {
-      throw new ArgumentNullException(nameof(modelItem));
-    }
-    if (!modelItem.HasGeometry)
-    {
-      return [];
-    }
-
-    return !IsElementVisible(modelItem) ? [] : _geometryConverter.Convert(modelItem);
-  }
+  internal List<Base> GetDisplayValue(NAV.ModelItem modelItem) =>
+    modelItem == null
+      ? throw new ArgumentNullException(nameof(modelItem))
+      : !modelItem.HasGeometry
+        ? ([])
+        : !IsElementVisible(modelItem)
+          ? []
+          :
+          // this can be meshes or the instance reference objects
+          // the un transformed objects stored in a separate collection
+          geometryConverter.Convert(modelItem);
 }
@@ -46,6 +46,19 @@ public static class NavisworksConverterServiceRegistration
    serviceCollection.AddScoped<DisplayValueExtractor>();
    serviceCollection.AddScoped<GeometryToSpeckleConverter>();

+    // Register dual shared geometry stores for instancing pattern (.NET Framework compatible)
+    // Store 1: For geometry definitions (Mesh, Curve, etc.) - Store 2: For InstanceDefinitionProxy objects
+    serviceCollection.AddScoped<InstanceStoreManager>();
+
+    // Register ISharedGeometryStore interface using the geometry definitions store for backward compatibility
+    serviceCollection.AddScoped<ISharedGeometryStore>(provider =>
+      provider.GetRequiredService<InstanceStoreManager>().GeometryDefinitionsStore);
+
+    // Register settings resolved from factory
+    serviceCollection.AddScoped<NavisworksConversionSettings>(sp =>
+      sp.GetRequiredService<INavisworksConversionSettingsFactory>().Current
+    );
+
    return serviceCollection;
  }
 }
@@ -0,0 +1,60 @@
+using System.Runtime.InteropServices;
+
+namespace Speckle.Converter.Navisworks.Helpers;
+
+/// <summary>
+/// ComScope - Because Navisworks COM objects are like vampires that never die unless you tell them to.
+///
+/// This is a RAII (Resource Acquisition Is Initialization) wrapper for COM objects.
+/// Think of it as a babysitter that makes sure COM objects get cleaned up properly
+/// when you're done with them, preventing memory leaks that would otherwise
+/// slowly consume your machine's RAM like a digital Pac-Man.
+///
+/// Why do we need this?
+/// - Navisworks COM API creates objects that live forever unless explicitly released
+/// - Forgetting to call Marshal.ReleaseComObject() = memory leak city
+/// - Using statements + IDisposable = automatic cleanup when scope ends
+/// - One less thing to remember = fewer bugs = happier developers
+///
+/// Usage: Wrap it in a 'using' statement and let C# handle the cleanup:
+///   using var comThing = new ComScope&lt;SomeComType&gt;(myComObject);
+///   // Do stuff with comThing.Value
+///   // Automatic cleanup happens here when using block ends
+///
+/// Pro tip: This prevents the "why is Navisworks eating all my RAM?" conversations
+/// that happen way too often with COM interop code.
+/// </summary>
+/// <typeparam name="T">The COM object type we're babysitting</typeparam>
+public readonly struct ComScope<T>(T comObject, bool shouldRelease = true) : IDisposable
+  where T : class
+{
+  public ComScope(T comObject)
+    : this(comObject, false) { }
+
+  private T ComObject { get; } = comObject;
+  private bool ShouldRelease { get; } = shouldRelease;
+
+  public T Value => ComObject;
+
+  /// <summary>
+  /// The magic cleanup method. This gets called automatically when the 'using' block ends.
+  /// It tells the COM object "your services are no longer required" in a polite way
+  /// that doesn't crash the application.
+  /// </summary>
+  public void Dispose()
+  {
+    // Only release if we're supposed to AND the object actually exists
+    if (ShouldRelease && ComObject != null)
+    {
+      try
+      {
+        // This is the important bit - tells COM runtime to decrement reference count
+        Marshal.ReleaseComObject(ComObject);
+      }
+      catch (InvalidComObjectException)
+      {
+        // Sometimes the object is already gone (maybe someonereleased, ignore
+      }
+    }
+  }
+}
@@ -48,9 +48,7 @@ public static class PropertyHelpers
    }

    // Default case for unsupported types
-    return value.DataType == NAV.VariantDataType.None || value.DataType == NAV.VariantDataType.Point2D
-      ? null
-      : value.ToString();
+    return value.DataType is NAV.VariantDataType.None or NAV.VariantDataType.Point2D ? null : value.ToString();
  }

  /// <summary>
@@ -0,0 +1,154 @@
+using Microsoft.Extensions.Logging;
+using Speckle.Sdk.Models;
+using Speckle.Sdk.Models.Instances;
+
+namespace Speckle.Converter.Navisworks.Services;
+
+/// <summary>
+/// Simple wrapper class that manages two SharedGeometryStores instances for dual instancing pattern.
+/// Provides easy access to both mesh definitions store and instance definition proxies store.
+/// </summary>
+public class InstanceStoreManager(ILogger<InstanceStoreManager> logger)
+{
+  private readonly ILogger<InstanceStoreManager> _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+
+  /// <summary>
+  /// Store for geometry definitions (geometry data) - untransformed base geometries.
+  /// </summary>
+  internal SharedGeometryStore GeometryDefinitionsStore { get; } = new();
+
+  /// <summary>
+  /// Store for InstanceDefinitionProxy objects that reference geometry definitions.
+  /// </summary>
+  internal SharedGeometryStore InstanceDefinitionProxiesStore { get; } = new();
+
+  /// <summary>
+  /// Clears both stores for a new conversion session.
+  /// Should be called at the start of each conversion.
+  /// </summary>
+  public void ClearAll()
+  {
+    GeometryDefinitionsStore.Clear();
+    InstanceDefinitionProxiesStore.Clear();
+  }
+
+  /// <summary>
+  /// Gets all instance definition proxies from the store, cast to their specific type.
+  /// Useful for adding to root collection at end of conversion.
+  /// </summary>
+  public IReadOnlyCollection<InstanceDefinitionProxy> GetInstanceDefinitionProxies()
+  {
+    var proxies = InstanceDefinitionProxiesStore.Geometries.OfType<InstanceDefinitionProxy>().ToList().AsReadOnly();
+    _logger.LogDebug("GetInstanceDefinitionProxies returning {Count} proxies", proxies.Count);
+    return proxies;
+  }
+
+  /// <summary>
+  /// Gets all geometry definitions from the geometry definitions store.
+  /// </summary>
+  /// <returns></returns>
+  public List<Base> GetGeometryDefinitions() => [.. GeometryDefinitionsStore.Geometries.ToList().AsReadOnly()];
+
+  /// <summary>
+  /// Gets a geometry definition by its application ID from the geometry definitions store.
+  /// </summary>
+  /// <returns>The geometry if found, null otherwise.</returns>
+  public Base? GetGeometryDefinition(string fragmentId) =>
+    GeometryDefinitionsStore.Geometries.FirstOrDefault(g => g.applicationId == $"geom_{fragmentId}");
+
+  /// <summary>
+  /// Gets an instance definition proxy by its application ID.
+  /// </summary>
+  /// <returns>The instance definition proxy if found, null otherwise.</returns>
+  public InstanceDefinitionProxy? GetInstanceDefinitionProxy(string fragmentId) =>
+    InstanceDefinitionProxiesStore
+      .Geometries.OfType<InstanceDefinitionProxy>()
+      .FirstOrDefault(p => p.applicationId == $"def_{fragmentId}");
+
+  /// <summary>
+  /// Adds a geometry definition and corresponding instance definition proxy for shared geometry.
+  /// This is a convenience method that handles both stores in one call.
+  /// </summary>
+  /// <param name="fragmentId">The fragment-based application ID.</param>
+  /// <param name="geometry">The untransformed base geometry.</param>
+  /// <returns>True if both were added (new geometry), false if they already existed.</returns>
+  public bool AddSharedGeometry(string fragmentId, Base geometry)
+  {
+    _logger.LogDebug("AddSharedGeometry called for FragmentId={FragmentId}", fragmentId);
+
+    bool geometryAdded = false;
+    bool proxyAdded = false;
+
+    // Create prefixed IDs for 1:1:1 relationship using base fragment hash
+    var geometryId = $"geom_{fragmentId}";
+    var definitionId = $"def_{fragmentId}";
+
+    _logger.LogDebug("Using GeometryId={GeometryId}, DefinitionId={DefinitionId}", geometryId, definitionId);
+
+    // Add geometry definition if not exists
+    if (!GeometryDefinitionsStore.Contains(geometryId))
+    {
+      geometry.applicationId = geometryId;
+      geometryAdded = GeometryDefinitionsStore.Add(geometry);
+      _logger.LogDebug("Added geometry definition: {GeometryId}, Success={Success}", geometryId, geometryAdded);
+    }
+    else
+    {
+      _logger.LogDebug("Geometry definition already exists: {GeometryId}", geometryId);
+    }
+
+    // Add instance definition proxy if not exists
+    if (!InstanceDefinitionProxiesStore.Contains(definitionId))
+    {
+      if (geometry.applicationId == null)
+      {
+        _logger.LogWarning(
+          "Cannot create instance definition proxy - geometry.id is null for FragmentId={FragmentId}",
+          fragmentId
+        );
+        var result = geometryAdded || proxyAdded;
+        _logger.LogDebug(
+          "AddSharedGeometry completed: FragmentId={FragmentId}, Result={Result}, GeometryAdded={GeometryAdded}, ProxyAdded={ProxyAdded}",
+          fragmentId,
+          result,
+          geometryAdded,
+          proxyAdded
+        );
+        return result;
+      }
+
+      var definitionProxy = new InstanceDefinitionProxy
+      {
+        applicationId = definitionId,
+        name = $"Shared Geometry {fragmentId[..8]}...", // Show first 8 chars for readability
+        objects = [geometry.applicationId],
+        maxDepth = 0
+      };
+      proxyAdded = InstanceDefinitionProxiesStore.Add(definitionProxy);
+      _logger.LogDebug("Added instance definition proxy: {DefinitionId}, Success={Success}", definitionId, proxyAdded);
+    }
+    else
+    {
+      _logger.LogDebug("Instance definition proxy already exists: {DefinitionId}", definitionId);
+    }
+
+    var conversionSucceededResult = geometryAdded || proxyAdded;
+    _logger.LogDebug(
+      "AddSharedGeometry completed: FragmentId={FragmentId}, Result={Result}, GeometryAdded={GeometryAdded}, ProxyAdded={ProxyAdded}",
+      fragmentId,
+      conversionSucceededResult,
+      geometryAdded,
+      proxyAdded
+    );
+    return conversionSucceededResult;
+  }
+
+  /// <summary>
+  /// Checks if shared geometry already exists in both stores.
+  /// </summary>
+  /// <param name="fragmentId">The fragment-based application ID.</param>
+  /// <returns>True if geometry definition exists in both stores.</returns>
+  public bool ContainsSharedGeometry(string fragmentId) => GeometryDefinitionsStore.Contains($"geom_{fragmentId}")
+  // && InstanceDefinitionProxiesStore.Contains($"def_{fragmentId}")
+  ;
+}
@@ -0,0 +1,92 @@
+using Speckle.InterfaceGenerator;
+using Speckle.Sdk.Models;
+
+namespace Speckle.Converter.Navisworks.Services;
+
+[GenerateAutoInterface]
+public class SharedGeometryStore : ISharedGeometryStore
+{
+  private readonly HashSet<Base> _geometries = new();
+  private readonly Dictionary<string, Base> _geometriesByApplicationId = new();
+  private readonly object _lock = new();
+
+  /// <summary>
+  /// Gets a read-only collection of all stored geometries.
+  /// </summary>
+  public IReadOnlyCollection<Base> Geometries
+  {
+    get
+    {
+      lock (_lock)
+      {
+        return _geometries.ToList().AsReadOnly();
+      }
+    }
+  }
+
+  /// <summary>
+  /// Adds a geometry to the store if it doesn't already exist.
+  /// </summary>
+  /// <param name="geometry">The geometry to add.</param>
+  /// <returns>True if the geometry was added, false if it already existed.</returns>
+  public bool Add(Base geometry)
+  {
+    if (geometry == null)
+    {
+      throw new ArgumentNullException(nameof(geometry));
+    }
+
+    if (string.IsNullOrEmpty(geometry.applicationId))
+    {
+      throw new ArgumentException("Geometry must have an applicationId for deduplication", nameof(geometry));
+    }
+
+    lock (_lock)
+    {
+      if (geometry.applicationId != null && _geometriesByApplicationId.ContainsKey(geometry.applicationId))
+      {
+        return false; // Already exists
+      }
+
+      _geometries.Add(geometry);
+      if (geometry.applicationId != null)
+      {
+        _geometriesByApplicationId[geometry.applicationId] = geometry;
+      }
+
+      return true; // Added successfully
+    }
+  }
+
+  /// <summary>
+  /// Checks if a geometry with the specified application ID already exists in the store.
+  /// </summary>
+  /// <param name="applicationId">The application ID to check for.</param>
+  /// <returns>True if a geometry with the application ID exists, false otherwise.</returns>
+  public bool Contains(string applicationId)
+  {
+    if (string.IsNullOrEmpty(applicationId))
+    {
+      return false;
+    }
+
+    lock (_lock)
+    {
+      var contains = _geometriesByApplicationId.ContainsKey(applicationId);
+
+      return contains;
+    }
+  }
+
+  /// <summary>
+  /// Clears all stored geometries for a new conversion session.
+  /// </summary>
+  public void Clear()
+  {
+    lock (_lock)
+    {
+      _geometries.Clear();
+      _geometriesByApplicationId.Clear();
+    }
+  }
+}
@@ -9,35 +9,38 @@
    <Import_RootNamespace>Speckle.Converters.NavisworksShared</Import_RootNamespace>
  </PropertyGroup>
  <ItemGroup>
-    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\ClassPropertiesExtractor.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\DisplayValueExtractor.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\ModelPropertiesExtractor.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\PropertySetsExtractor.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\RevitBuiltInCategoryExtractor.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\BasePropertyHandler.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\HierarchicalPropertyHandler.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\IPropertyHandler.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\StandardPropertyHandler.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DependencyInjection\NavisworksConverterServiceRegistration.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Extensions\ArrayExtensions.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Geometries\Primitives.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Geometries\TransformMatrix.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Helpers\ColorConverter.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Helpers\HierarchyHelper.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Helpers\ElementSelectionHelper.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Helpers\PrimitiveProcessor.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Helpers\PropertyHelpers.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)GlobalUsing.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Helpers\GeometryHelpers.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)PathConstants.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\Raw\GeometryToSpeckleConverter.cs" />
-    <Folder Include="$(MSBuildThisFileDirectory)Models\" />
-    <Compile Include="$(MSBuildThisFileDirectory)Services\NavisworksToSpeckleUnitConverter.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Settings\ConversionModes.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Settings\NavisworksConversionSettings.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Settings\NavisworksConversionSettingsFactory.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\NavisworksRootToSpeckleConverter.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\Raw\BoundingBoxToSpeckleRawConverter.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\TopLevel\ModelItemTopLevelConverterToSpeckle.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\ClassPropertiesExtractor.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\DisplayValueExtractor.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\ModelPropertiesExtractor.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\PropertySetsExtractor.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataExtractors\RevitBuiltInCategoryExtractor.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\BasePropertyHandler.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\HierarchicalPropertyHandler.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\IPropertyHandler.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DataHandlers\StandardPropertyHandler.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)DependencyInjection\NavisworksConverterServiceRegistration.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\ArrayExtensions.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Geometries\Primitives.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Geometries\TransformMatrix.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\ColorConverter.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\ComScope.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\HierarchyHelper.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\ElementSelectionHelper.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\PrimitiveProcessor.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\PropertyHelpers.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)GlobalUsing.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\GeometryHelpers.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)PathConstants.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Services\SharedGeometryStores.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Services\InstanceStoreManager.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\Raw\GeometryToSpeckleConverter.cs"/>
+    <Folder Include="$(MSBuildThisFileDirectory)Models\"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Services\NavisworksToSpeckleUnitConverter.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Settings\ConversionModes.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Settings\NavisworksConversionSettings.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)Settings\NavisworksConversionSettingsFactory.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\NavisworksRootToSpeckleConverter.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\Raw\BoundingBoxToSpeckleRawConverter.cs"/>
+    <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\TopLevel\ModelItemTopLevelConverterToSpeckle.cs"/>
  </ItemGroup>
-</Project>
+</Project>
@@ -1,11 +1,15 @@
-using System.Runtime.InteropServices;
+using System.Collections.Concurrent;
+using System.Runtime.InteropServices;
 using Autodesk.Navisworks.Api.Interop.ComApi;
-using Speckle.Converter.Navisworks.Extensions;
+using Microsoft.Extensions.Logging;
 using Speckle.Converter.Navisworks.Geometry;
 using Speckle.Converter.Navisworks.Helpers;
+using Speckle.Converter.Navisworks.Services;
 using Speckle.Converter.Navisworks.Settings;
+using Speckle.DoubleNumerics;
 using Speckle.Objects.Geometry;
 using Speckle.Sdk.Models;
+using Speckle.Sdk.Models.Instances;
 using ComApiBridge = Autodesk.Navisworks.Api.ComApi.ComApiBridge;

 namespace Speckle.Converter.Navisworks.ToSpeckle;
@@ -21,23 +25,59 @@ namespace Speckle.Converter.Navisworks.ToSpeckle;
 /// 3. Process each InwOaFragment3 to generate primitives
 /// 4. Convert those primitives to Speckle geometry with appropriate transforms
 /// </summary>
-public class GeometryToSpeckleConverter
+public class GeometryToSpeckleConverter(
+  NavisworksConversionSettings settings,
+  InstanceStoreManager instanceStoreManager,
+  ILogger<GeometryToSpeckleConverter> logger
+)
 {
-  private readonly NavisworksConversionSettings _settings;
-  private readonly bool _isUpright;
-  private readonly SafeVector _transformVector;
+  private readonly NavisworksConversionSettings _settings =
+    settings ?? throw new ArgumentNullException(nameof(settings));
+
+  private readonly bool _isUpright = settings.Derived.IsUpright;
+  private readonly SafeVector _transformVector = settings.Derived.TransformVector;
  private const double SCALE = 1.0; // Default scale factor

-  public GeometryToSpeckleConverter(NavisworksConversionSettings settings)
+  private readonly InstanceStoreManager _instanceStoreManager =
+    instanceStoreManager ?? throw new ArgumentNullException(nameof(instanceStoreManager));
+
+  private readonly ILogger<GeometryToSpeckleConverter> _logger =
+    logger ?? throw new ArgumentNullException(nameof(logger));
+
+  // Fragment ID cache for performance optimization
+  private readonly ConcurrentDictionary<int, string> _fragmentIdCache = new();
+
+  // Geometry cache for repeated items
+  private readonly ConcurrentDictionary<string, List<Base>> _geometryCache = new();
+
+  /// <summary>
+  /// Clears all internal caches. Should be called when starting a new conversion session.
+  /// </summary>
+  public void ClearCaches()
  {
-    _settings = settings ?? throw new ArgumentNullException(nameof(settings));
-    _isUpright = settings.Derived.IsUpright;
-    _transformVector = settings.Derived.TransformVector;
+    _fragmentIdCache.Clear();
+    _geometryCache.Clear();
+  }
+
+  /// <summary>
+  /// Gets cache statistics for performance monitoring.
+  /// </summary>
+  /// <returns>A record containing cache hit counts and sizes</returns>
+  public (int FragmentIdCacheSize, int GeometryCacheSize, double CacheMemoryEstimateMB) GetCacheStatistics()
+  {
+    var fragmentCacheSize = _fragmentIdCache.Count;
+    var geometryCacheSize = _geometryCache.Count;
+
+    // Rough memory estimate (fragment IDs ~50 bytes, geometry objects ~10KB average)
+    var estimatedMemoryMb = (fragmentCacheSize * 50 + geometryCacheSize * 10240) / (1024.0 * 1024.0);
+
+    return (fragmentCacheSize, geometryCacheSize, Math.Round(estimatedMemoryMb, 2));
  }

  /// <summary>
  /// Converts a ModelItem's geometry to Speckle display geometry by accessing the underlying COM objects.
-  /// Applies necessary transformations and unit scaling.
+  /// When path.Fragments().Count > 1, extracts untransformed base geometry once, stores in SharedGeometryStore,
+  /// and returns instance references. Otherwise, returns transformed geometry directly.
  /// </summary>
  internal List<Base> Convert(NAV.ModelItem modelItem)
  {
@@ -51,59 +91,134 @@ public class GeometryToSpeckleConverter
      return [];
    }

-    var comSelection = ComApiBridge.ToInwOpSelection([modelItem]);
+    // Check geometry cache first
+    var itemId = modelItem.InstanceGuid.ToString();
+    if (_geometryCache.TryGetValue(itemId, out var cachedGeometry))
+    {
+      return cachedGeometry;
+    }
+
+    using var comSelection = new ComScope<InwOpSelection>(ComApiBridge.ToInwOpSelection([modelItem]));
+    var fragmentStack = new Stack<InwOaFragment3>();
+
+    using var paths = new ComScope<InwSelectionPathsColl>(comSelection.Value.Paths());
+
    try
    {
-      var fragmentStack = new Stack<InwOaFragment3>();
-      var paths = comSelection.Paths();
-      try
+      // Check if this geometry is shared across multiple instances
+      List<Base> result;
+      if (paths.Value.Count > 0)
      {
-        // Populate fragment stack with all fragments
-        foreach (InwOaPath path in paths)
-        {
-          CollectFragments(path, fragmentStack);
-        }
+        var firstPath = paths.Value.Cast<InwOaPath>().First();
+        var fragmentsCollection = firstPath.Fragments();

-        return ProcessFragments(fragmentStack, paths);
-      }
-      finally
-      {
-        if (paths != null)
+        if (fragmentsCollection.Count > 1)
        {
-          Marshal.ReleaseComObject(paths);
+          // Shared geometry - extract base geometry once and return instance reference
+          result = ProcessSharedGeometry(paths.Value, fragmentStack);
+        }
+        else
+        {
+          // Single instance geometry - process normally with transforms
+          foreach (InwOaPath path in paths.Value)
+          {
+            CollectFragments(path, fragmentStack);
+          }
+
+          result = ProcessFragments(fragmentStack, paths.Value, true);
        }
      }
-    }
-    finally
-    {
-      if (comSelection != null)
+      else
      {
-        Marshal.ReleaseComObject(comSelection);
+        result = [];
      }
+
+      // Cache the result for future use
+      if (result.Count > 0)
+      {
+        _geometryCache.TryAdd(itemId, result);
+      }
+
+      return result;
+    }
+    catch (COMException ex)
+    {
+      _logger.LogError(ex, "COM exception converting geometry for ModelItem {ItemId}", itemId);
+      return [];
+    }
+    catch (InvalidOperationException ex)
+    {
+      _logger.LogError(ex, "Invalid operation converting geometry for ModelItem {ItemId}", itemId);
+      return [];
    }
  }

  private static void CollectFragments(InwOaPath path, Stack<InwOaFragment3> fragmentStack)
  {
-    var fragments = path.Fragments();
-    foreach (var fragment in fragments.OfType<InwOaFragment3>())
+    using var fragments = new ComScope<InwNodeFragsColl>(path.Fragments());
+
+    foreach (var fragment in fragments.Value.OfType<InwOaFragment3>())
    {
-      if (fragment.path?.ArrayData is not Array pathData1 || path.ArrayData is not Array pathData2)
-      {
-        continue;
-      }
-
-      var pathArray1 = pathData1.ToArray<int>();
-      var pathArray2 = pathData2.ToArray<int>();
-
-      if (pathArray1.Length == pathArray2.Length && pathArray1.SequenceEqual(pathArray2))
+      if (ValidateFragmentPath(fragment, path))
      {
        fragmentStack.Push(fragment);
      }
    }
  }

-  private List<Base> ProcessFragments(Stack<InwOaFragment3> fragmentStack, InwSelectionPathsColl paths)
+  private List<Base> ProcessSharedGeometry(InwSelectionPathsColl paths, Stack<InwOaFragment3> fragmentStack)
+  {
+    // Generate ID from fragment data for shared geometry
+    var fragmentId = GenerateFragmentId(paths);
+
+    if (string.IsNullOrEmpty(fragmentId))
+    {
+      // Fallback to normal processing if we can't generate ID
+      foreach (InwOaPath path in paths)
+      {
+        CollectFragments(path, fragmentStack);
+      }
+
+      return ProcessFragments(fragmentStack, paths, true);
+    }
+
+    // Check if shared geometry already exists in store
+    if (_instanceStoreManager.ContainsSharedGeometry(fragmentId))
+    {
+      // Return instance reference to existing geometry
+      return CreateInstanceReference(fragmentId, paths);
+    }
+
+    // Extract untransformed base geometry
+    foreach (InwOaPath path in paths)
+    {
+      CollectFragments(path, fragmentStack);
+    }
+
+    var baseGeometry = ExtractUntransformedGeometry(fragmentStack);
+
+    if (baseGeometry == null)
+    {
+      return ProcessFragments(fragmentStack, paths);
+    }
+
+    // Store both the geometry definition and create the instance definition proxy
+    if (!_instanceStoreManager.AddSharedGeometry(fragmentId, baseGeometry))
+    {
+      return ProcessFragments(fragmentStack, paths);
+    }
+
+    // Return instance reference to the newly stored geometry
+    return CreateInstanceReference(fragmentId, paths);
+
+    // Fallback to normal processing if store failed
+  }
+
+  private List<Base> ProcessFragments(
+    Stack<InwOaFragment3> fragmentStack,
+    InwSelectionPathsColl paths,
+    bool isSingleObject = false
+  )
  {
    var callbackListeners = new List<PrimitiveProcessor>();

@@ -111,41 +226,52 @@ public class GeometryToSpeckleConverter
    {
      var processor = new PrimitiveProcessor(_isUpright);

+      using var pathFragments = new ComScope<InwNodeFragsColl>(path.Fragments());
+      var fragmentCount = pathFragments.Value.Count;
+
      foreach (var fragment in fragmentStack)
      {
-        if (!ValidateFragmentPath(fragment, path))
+        try
        {
-          continue;
-        }
+          var matrix = fragment.GetLocalToWorldMatrix();
+          var transform = matrix as InwLTransform3f3;
+          if (transform?.Matrix is not Array matrixArray)
+          {
+            continue;
+          }

-        var matrix = fragment.GetLocalToWorldMatrix();
-        var transform = matrix as InwLTransform3f3;
-        if (transform?.Matrix is not Array matrixArray)
+          double[] makeNoChange = [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];
+          double[] transformMatrix = ConvertArrayToDouble(matrixArray);
+
+          if (isSingleObject || fragmentCount == 1)
+          {
+            // Apply coordinate system transformation
+            processor.LocalToWorldTransformation = transformMatrix;
+          }
+          else
+          {
+            // For multiple objects, process geometry without transforms
+            processor.LocalToWorldTransformation = makeNoChange;
+          }
+
+          fragment.GenerateSimplePrimitives(nwEVertexProperty.eNORMAL, processor);
+        }
+        catch (COMException ex)
        {
-          continue;
+          _logger.LogWarning(ex, "COM exception processing fragment, skipping");
        }
-
-        processor.LocalToWorldTransformation = ConvertArrayToDouble(matrixArray);
-        fragment.GenerateSimplePrimitives(nwEVertexProperty.eNORMAL, processor);
      }

      callbackListeners.Add(processor);
    }

-    var baseGeometries = ProcessGeometries(callbackListeners);
-
-    return baseGeometries;
+    return ProcessGeometries(callbackListeners);
  }

-  private static bool ValidateFragmentPath(InwOaFragment3 fragment, InwOaPath path)
-  {
-    if (fragment.path?.ArrayData is not Array fragmentPathData || path.ArrayData is not Array pathData)
-    {
-      return false;
-    }
-
-    return IsSameFragmentPath(fragmentPathData, pathData);
-  }
+  private static bool ValidateFragmentPath(InwOaFragment3 fragment, InwOaPath path) =>
+    fragment.path?.ArrayData is Array fragmentPathData
+    && path.ArrayData is Array pathData
+    && IsSameFragmentPath(fragmentPathData, pathData);

  private List<Base> ProcessGeometries(List<PrimitiveProcessor> processors)
  {
@@ -204,9 +330,8 @@ public class GeometryToSpeckleConverter
  }

  private List<Line> CreateLines(IReadOnlyList<SafeLine> lines) =>
-    (
-      from line in lines
-      select new Line
+    lines
+      .Select(line => new Line
      {
        start = new Point(
          (line.Start.X + _transformVector.X) * SCALE,
@@ -221,10 +346,395 @@ public class GeometryToSpeckleConverter
          _settings.Derived.SpeckleUnits
        ),
        units = _settings.Derived.SpeckleUnits
-      }
-    ).ToList();
+      })
+      .ToList();

-  private static double[]? ConvertArrayToDouble(Array arr)
+  /// <summary>
+  /// Generates an idempotent ID from fragment path data for shared geometry.
+  /// Uses the path.Fragments() collection to create a reproducible hash.
+  /// </summary>
+  public string GenerateFragmentId(InwSelectionPathsColl paths)
+  {
+    try
+    {
+      if (paths.Count == 0)
+      {
+        return string.Empty;
+      }
+
+      // Generate a fast hash code for cache lookup
+      var pathsHashCode = GenerateFastPathsHashCode(paths);
+
+      // Check cache first
+      if (_fragmentIdCache.TryGetValue(pathsHashCode, out var cachedId))
+      {
+        return cachedId;
+      }
+
+      var fragmentHashes = new List<string>();
+
+      foreach (InwOaPath path in paths)
+      {
+        var fragments = path.Fragments();
+
+        var fragmentIndex = 0;
+        foreach (InwOaFragment3 fragment in fragments.OfType<InwOaFragment3>())
+        {
+          if (fragment.path?.ArrayData is not Array pathData)
+          {
+            fragmentIndex++;
+            continue;
+          }
+
+          if (pathData.Length == 0)
+          {
+            fragmentIndex++;
+            continue;
+          }
+
+          try
+          {
+            // Check array rank first - COM arrays might be multidimensional
+            if (pathData.Rank != 1)
+            {
+              // Try simple enumeration fallback
+              var fragmentHashFallback = TrySimpleArrayEnumeration(pathData, fragmentIndex);
+              if (!string.IsNullOrEmpty(fragmentHashFallback))
+              {
+                fragmentHashes.Add(fragmentHashFallback);
+              }
+
+              fragmentIndex++;
+              continue;
+            }
+
+            var lowerBound = pathData.GetLowerBound(0);
+            var upperBound = pathData.GetUpperBound(0);
+
+            var arrayLength = upperBound - lowerBound + 1;
+            var pathInts = new int[arrayLength];
+
+            for (int i = lowerBound; i <= upperBound; i++)
+            {
+              try
+              {
+                var value = pathData.GetValue(i);
+                var arrayIndex = i - lowerBound;
+                pathInts[arrayIndex] = System.Convert.ToInt32(value);
+              }
+              catch (Exception ex) when (ex is InvalidCastException or OverflowException or FormatException)
+              {
+                // Skip invalid array values
+              }
+            }
+
+            var fragmentHash = string.Join("_", pathInts);
+            fragmentHashes.Add(fragmentHash);
+          }
+          catch (Exception ex) when (ex is InvalidCastException or IndexOutOfRangeException or RankException)
+          {
+            // Try simple enumeration as fallback
+            var fragmentHash = TrySimpleArrayEnumeration(pathData, fragmentIndex);
+            if (!string.IsNullOrEmpty(fragmentHash))
+            {
+              fragmentHashes.Add(fragmentHash);
+            }
+
+            fragmentIndex++;
+            continue;
+          }
+
+          fragmentIndex++;
+        }
+      }
+
+      string fragmentId;
+      if (fragmentHashes.Count > 0)
+      {
+        // Sort to ensure consistent ordering
+        fragmentHashes.Sort();
+        var rawData = string.Join("__", fragmentHashes);
+        fragmentId = HashRawData(rawData);
+      }
+      else
+      {
+        fragmentId = string.Empty;
+      }
+
+      // Cache the result for future use
+      if (!string.IsNullOrEmpty(fragmentId))
+      {
+        _fragmentIdCache.TryAdd(pathsHashCode, fragmentId);
+      }
+
+      return fragmentId;
+    }
+    catch (Exception ex)
+      when (ex
+          is InvalidCastException
+            or IndexOutOfRangeException
+            or OverflowException
+            or ArgumentException
+            or COMException
+      )
+    {
+      _logger.LogWarning(ex, "Failed to generate fragment ID due to {ExceptionType}", ex.GetType().Name);
+      return string.Empty;
+    }
+  }
+
+  /// <summary>
+  /// Simple array enumeration fallback when bounds access fails.
+  /// Tries to enumerate array by simple sequential access.
+  /// </summary>
+  private string TrySimpleArrayEnumeration(Array pathData, int fragmentIndex)
+  {
+    try
+    {
+      var values = new List<string>();
+      var maxAttempts = Math.Min(pathData.Length, 20); // Limit attempts to avoid infinite loops
+
+      for (int i = 0; i < maxAttempts; i++)
+      {
+        try
+        {
+          var value = pathData.GetValue(i);
+          var convertedValue = System.Convert.ToInt32(value);
+          values.Add(convertedValue.ToString());
+          _logger.LogDebug("Fragment {FragmentIndex} simple enum[{Index}] = {Value}", fragmentIndex, i, convertedValue);
+        }
+        catch (IndexOutOfRangeException)
+        {
+          // Hit the end of valid indices
+          _logger.LogDebug("Fragment {FragmentIndex} reached end of array at index {Index}", fragmentIndex, i);
+          break;
+        }
+        catch (Exception ex)
+          when (ex is InvalidCastException or OverflowException or FormatException or ArgumentException)
+        {
+          _logger.LogWarning(ex, "Fragment {FragmentIndex} failed to convert value at index {Index}", fragmentIndex, i);
+        }
+      }
+
+      if (values.Count <= 0)
+      {
+        return string.Empty;
+      }
+
+      var hash = string.Join("_", values);
+      return hash;
+    }
+    catch (Exception ex) when (ex is COMException or InvalidCastException or ArgumentException)
+    {
+      _logger.LogWarning(ex, "Simple enumeration failed for fragment {FragmentIndex}", fragmentIndex);
+      return string.Empty;
+    }
+  }
+
+  /// <summary>
+  /// Generates a fast hash code for paths collection for caching purposes
+  /// </summary>
+  private static int GenerateFastPathsHashCode(InwSelectionPathsColl paths)
+  {
+    unchecked
+    {
+      int hash = 17;
+      hash = hash * 23 + paths.Count;
+
+      var processed = 0;
+      foreach (InwOaPath path in paths)
+      {
+        if (path.ArrayData is Array { Length: > 0 } pathData)
+        {
+          // Sample first few elements for performance
+          var sampleSize = Math.Min(pathData.Length, 4);
+          for (int i = 0; i < sampleSize; i++)
+          {
+            hash = hash * 23 + (pathData.GetValue(i)?.GetHashCode() ?? 0);
+          }
+
+          hash = hash * 23 + pathData.Length;
+        }
+
+        // Limit processing for performance
+        if (++processed >= 8)
+        {
+          break;
+        }
+      }
+
+      return hash;
+    }
+  }
+
+  /// <summary>
+  /// Creates a fast hash of the raw fragment data using .NET's HashCode struct.
+  /// For performance, we use HashCode instead of SHA256 for fragment IDs.
+  /// </summary>
+  /// <returns>Hash as hex string</returns>
+  private static string HashRawData(string rawData)
+  {
+    var hashCode = rawData.GetHashCode();
+    return hashCode.ToString("X8");
+  }
+
+  /// <summary>
+  /// Extracts untransformed base geometry from fragments.
+  /// This geometry will be stored once and referenced by instances.
+  /// </summary>
+  private Base? ExtractUntransformedGeometry(Stack<InwOaFragment3> fragmentStack)
+  {
+    var processor = new PrimitiveProcessor(_isUpright);
+
+    // Process fragments without transforms to get base geometry
+    foreach (var fragment in fragmentStack)
+    {
+      // Use identity transform to get untransformed geometry
+      double[] identityTransform = [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];
+      processor.LocalToWorldTransformation = identityTransform;
+
+      fragment.GenerateSimplePrimitives(nwEVertexProperty.eNORMAL, processor);
+    }
+
+    // Create mesh from untransformed geometry
+    return processor.Triangles.Count > 0 ? CreateMesh(processor.Triangles) : null;
+  }
+
+  /// <summary>
+  /// Creates an instance reference to shared geometry stored in the InstanceStoreManager.
+  /// This is returned instead of full geometry for shared instances.
+  /// </summary>
+  private List<Base> CreateInstanceReference(string fragmentId, InwSelectionPathsColl paths)
+  {
+    var transform = ExtractInstanceTransform(paths);
+
+    var instanceReference = new InstanceProxy
+    {
+      definitionId = $"def_{fragmentId}",
+      transform = transform,
+      units = _settings.Derived.SpeckleUnits,
+      maxDepth = 0,
+      applicationId = Guid.NewGuid().ToString()
+    };
+
+    return [instanceReference];
+  }
+
+  /// <summary>
+  /// Extracts the transform matrix from the first path's fragments for instance placement.
+  /// </summary>
+  private Matrix4x4 ExtractInstanceTransform(InwSelectionPathsColl paths)
+  {
+    try
+    {
+      if (paths.Count == 0)
+      {
+        return new Matrix4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
+      }
+
+      var firstPath = paths.Cast<InwOaPath>().First();
+      using var fragments = new ComScope<InwNodeFragsColl>(firstPath.Fragments());
+
+      if (fragments.Value.Count == 0)
+      {
+        return new Matrix4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
+      }
+
+      var fragmentStack = new Stack<InwOaFragment3>();
+      // Get the first fragment's transform matrix
+      foreach (var frag in fragments.Value.OfType<InwOaFragment3>())
+      {
+        try
+        {
+          if (frag.path?.ArrayData is not Array pathData1 || firstPath.ArrayData is not Array pathData2)
+          {
+            continue;
+          }
+
+          // Use IsSameFragmentPath for consistency and performance
+          if (IsSameFragmentPath(pathData1, pathData2))
+          {
+            fragmentStack.Push(frag);
+          }
+        }
+        catch (COMException ex)
+        {
+          _logger.LogWarning(ex, "COM exception accessing fragment path data, skipping fragment");
+        }
+      }
+
+      if (fragmentStack.Count == 0)
+      {
+        _logger.LogWarning("No valid fragments found for transform extraction");
+        return new Matrix4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
+      }
+
+      var fragment = fragmentStack.First();
+      var matrix = fragment.GetLocalToWorldMatrix();
+
+      if (matrix is InwLTransform3f3 { Matrix: Array matrixArray })
+      {
+        var transformArray = ConvertArrayToDouble(matrixArray);
+
+        // Apply coordinate system transformation
+        var transformedMatrix = ApplyCoordinateTransform(transformArray);
+
+        var newMatrix = new Matrix4x4(
+          transformedMatrix[0],
+          transformedMatrix[1],
+          transformedMatrix[2],
+          transformedMatrix[3],
+          transformedMatrix[4],
+          transformedMatrix[5],
+          transformedMatrix[6],
+          transformedMatrix[7],
+          transformedMatrix[8],
+          transformedMatrix[9],
+          transformedMatrix[10],
+          transformedMatrix[11],
+          transformedMatrix[12],
+          transformedMatrix[13],
+          transformedMatrix[14],
+          transformedMatrix[15]
+        );
+
+        return Matrix4x4.Transpose(newMatrix);
+      }
+    }
+    catch (Exception ex)
+      when (ex
+          is COMException
+            or InvalidCastException
+            or IndexOutOfRangeException
+            or ArgumentException
+            or NullReferenceException
+      )
+    {
+      _logger.LogWarning(
+        ex,
+        "Failed to extract instance transform ({ExceptionType}) - returning identity matrix",
+        ex.GetType().Name
+      );
+    }
+
+    return new Matrix4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
+  }
+
+  private double[] ApplyCoordinateTransform(double[] matrixArray)
+  {
+    // Apply scale and coordinate transformation
+    var result = new double[16];
+    Array.Copy(matrixArray, result, 16);
+
+    // Apply translation transformation
+    result[12] = (result[12] + _transformVector.X) * SCALE;
+    result[13] = (result[13] + _transformVector.Y) * SCALE;
+    result[14] = (result[14] + _transformVector.Z) * SCALE;
+
+    return result;
+  }
+
+  private static double[] ConvertArrayToDouble(Array arr)
  {
    if (arr.Rank != 1)
    {
@@ -241,5 +751,10 @@ public class GeometryToSpeckleConverter
  }

  private static bool IsSameFragmentPath(Array a1, Array a2) =>
-    a1.Length == a2.Length && a1.Cast<int>().SequenceEqual(a2.Cast<int>());
+    a1.Length == a2.Length
+    && (
+      a1.Length > 4
+        ? a1.Cast<object>().SequenceEqual(a2.Cast<object>())
+        : !a1.Cast<object>().Where((_, i) => !Equals(a1.GetValue(i), a2.GetValue(i))).Any()
+    );
 }
@@ -1,4 +1,4 @@
-using Speckle.Converter.Navisworks.Settings;
+using Speckle.Converter.Navisworks.Settings;
 using Speckle.Converter.Navisworks.ToSpeckle.PropertyHandlers;
 using Speckle.Converters.Common;
 using Speckle.Converters.Common.Objects;
@@ -258,7 +258,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -287,18 +287,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -308,14 +308,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -258,7 +258,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -287,18 +287,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -308,14 +308,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -258,7 +258,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -287,18 +287,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -308,14 +308,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -209,7 +209,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -238,18 +238,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -257,14 +257,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -209,7 +209,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -238,18 +238,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -257,14 +257,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -9,15 +9,12 @@ namespace Speckle.Converters.RevitShared.Helpers;
 /// </summary>
 public static class ReferencePointHelper
 {
-  public const string REFERENCE_POINT_TRANSFORM_KEY = "referencePointTransform";
-
  /// <summary>
  /// Changes Revit Transform to a double array.
  /// Uses a 16-element column-major matrix representation. See https://speckle.guide/dev/objects.html
  /// </summary>
-  public static Dictionary<string, object> CreateTransformDataForRootObject(Transform transform)
-  {
-    return new Dictionary<string, object>
+  public static Dictionary<string, object> CreateTransformDataForRootObject(Transform transform) =>
+    new()
    {
      {
        "transform", // TODO: it would also be nice to include the key-value pair for reference point type as a string
@@ -42,7 +39,6 @@ public static class ReferencePointHelper
        }
      }
    };
-  }

  public static Matrix4x4 TransformToMatrix(Transform transform) =>
    new()
@@ -149,11 +149,15 @@ public class RevitToSpeckleCacheSingleton(ILogger<RevitToSpeckleCacheSingleton>
    // get specific material proxy
    if (!proxyMap.TryGetValue(materialId, out var materialProxy))
    {
-      logger.LogError(
-        "Cache inconsistency: Material proxy not found for material {MaterialId} in element {ElementId}",
-        materialId,
-        elementId
-      );
+      if (materialId != DB.ElementId.InvalidElementId.ToString())
+      {
+        logger.LogError(
+          "Cache inconsistency: Material proxy not found for material {MaterialId} in element {ElementId}",
+          materialId,
+          elementId
+        );
+      }
+
      return;
    }

@@ -73,6 +73,28 @@ public class ClassPropertiesExtractor
      elementProperties.Add("worksetName", worksetName);
    }

+    if (element is DB.FamilyInstance familyInstance)
+    {
+      try
+      {
+        // get room id if applicable (only for FamilyInstance elements)
+        if (familyInstance.Room is not null)
+        {
+          elementProperties.Add("roomId", familyInstance.Room.Id.ToString());
+        }
+
+        // get space id if applicable (only for FamilyInstance elements)
+        if (familyInstance.Space is not null)
+        {
+          elementProperties.Add("spaceId", familyInstance.Space.Id.ToString());
+        }
+      }
+      catch (Exception e) when (!e.IsFatal())
+      {
+        // silently ignore - not critical
+      }
+    }
+
    // get group name if applicable
    // TODO: in in group proxies separate issue. Below comments from PR #1081
    // We're using group proxies in Rhino etc. Groups should be handled similarly in Revit, unless there's a good
@@ -258,7 +258,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -287,18 +287,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -308,14 +308,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -258,7 +258,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -287,18 +287,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -308,14 +308,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    "net8.0": {
@@ -542,7 +542,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "Microsoft.Extensions.Logging": {
@@ -571,18 +571,18 @@
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@@ -337,18 +337,18 @@
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@@ -358,14 +358,14 @@
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@@ -343,7 +343,7 @@
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@@ -378,18 +378,18 @@
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@@ -343,7 +343,7 @@
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@@ -378,18 +378,18 @@
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@@ -314,9 +314,9 @@
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@@ -335,7 +335,7 @@
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@@ -373,18 +373,18 @@
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@@ -392,14 +392,14 @@
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@@ -259,9 +259,9 @@
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@@ -309,18 +309,18 @@
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@@ -330,14 +330,14 @@
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@@ -549,9 +549,9 @@
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@@ -599,18 +599,18 @@
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@@ -618,14 +618,14 @@
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@@ -259,9 +259,9 @@
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@@ -296,18 +296,18 @@
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-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
@@ -317,14 +317,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    },
    "net8.0": {
@@ -536,9 +536,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.logging": {
@@ -573,18 +573,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -592,14 +592,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -54,9 +54,9 @@
    <PackageVersion Include="Speckle.Civil3D.API" Version="2022.0.2" />
    <PackageVersion Include="Speckle.Revit.API" Version="2023.0.0" />
    <PackageVersion Include="Speckle.Navisworks.API" Version="2024.0.0" />
-    <PackageVersion Include="Speckle.Objects" Version="3.5.4" />
-    <PackageVersion Include="Speckle.Sdk" Version="3.5.4" />
-    <PackageVersion Include="Speckle.Sdk.Dependencies" Version="3.5.4" />
+    <PackageVersion Include="Speckle.Objects" Version="3.9.0" />
+    <PackageVersion Include="Speckle.Sdk" Version="3.9.0" />
+    <PackageVersion Include="Speckle.Sdk.Dependencies" Version="3.9.0" />
    <PackageVersion Include="SimpleExec" Version="12.0.0" />
    <GlobalPackageReference Include="PolySharp" Version="1.14.1" />
    <GlobalPackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
@@ -493,9 +493,9 @@
        "dependencies": {
          "Microsoft.Extensions.DependencyInjection": "[2.2.0, )",
          "Speckle.Connectors.Logging": "[1.0.0, )",
-          "Speckle.Objects": "[3.5.4, )",
-          "Speckle.Sdk": "[3.5.4, )",
-          "Speckle.Sdk.Dependencies": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )",
+          "Speckle.Sdk": "[3.9.0, )",
+          "Speckle.Sdk.Dependencies": "[3.9.0, )"
        }
      },
      "speckle.connectors.dui": {
@@ -527,7 +527,7 @@
        "type": "Project",
        "dependencies": {
          "Microsoft.Extensions.Logging.Abstractions": "[2.2.0, )",
-          "Speckle.Objects": "[3.5.4, )"
+          "Speckle.Objects": "[3.9.0, )"
        }
      },
      "speckle.converters.rhino8": {
@@ -604,18 +604,18 @@
      },
      "Speckle.Objects": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o7ex4+yHJYI8pJbsjNqw+D8r8WjkBoB5aK/GQlGJd/0zydrPxN4SMKS4arpRBR3CUD6JhtQMatScXZOrslGXQg==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "fAOUhScCfDFVVynvipczjyw9RZlOgPOo8aH5A7EDAwZiDuDdd4EsnrqBCSPlmuoPYzY7hsN+5mfRkfw2rB36Ig==",
        "dependencies": {
-          "Speckle.Sdk": "3.5.4"
+          "Speckle.Sdk": "3.9.0"
        }
      },
      "Speckle.Sdk": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "o4bEJTz+OBI1koy9xqXSIq3UtUFCKtk6Btg82rdVM2aFMPT3ZoYVarG+ylPcUOHd684XpgGASxE6dIgXz2pvng==",
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "GtbvnySinrE6Canm6fVjyUOxs4G1bw0aRLs9oPVMdodOKc9TxIQjp1lzVBtr6Jli+nzIxtC86xP5J6r9tufnrQ==",
        "dependencies": {
          "GraphQL.Client": "6.0.0",
          "Microsoft.Data.Sqlite": "7.0.5",
@@ -623,14 +623,14 @@
          "Microsoft.Extensions.Logging": "2.2.0",
          "Speckle.DoubleNumerics": "4.1.0",
          "Speckle.Newtonsoft.Json": "13.0.2",
-          "Speckle.Sdk.Dependencies": "3.5.4"
+          "Speckle.Sdk.Dependencies": "3.9.0"
        }
      },
      "Speckle.Sdk.Dependencies": {
        "type": "CentralTransitive",
-        "requested": "[3.5.4, )",
-        "resolved": "3.5.4",
-        "contentHash": "d0ZOHiK11Hq9r7YEkfTvVu33ygWtsrgysIWdCRAz6rdlcAgMCEkWVBoe3jDjxdmUy20TToaQlFKfMH4hTyzWXg=="
+        "requested": "[3.9.0, )",
+        "resolved": "3.9.0",
+        "contentHash": "m/3i+DX/1McN8ig0CcjmHM1BcNmNxgmny/735sKntzzDw23wdo868eOOTrogzmDoYHTyc7J4IjK+GE7iAyWn/g=="
      }
    }
  }
@@ -0,0 +1,77 @@
+# Intro
+The rhino importer is functionally made from two parts:
+- The `Speckle.Importers.JobProcessor`: A windows background service, designed to always be running.
+- The `Speckle.Importers.Rhino`: A commandline app triggered by the JobProcessor to handle a single job.
+
+They are deployed as a single product, and share the Innosetup installer deployment system of connectors.
+
+> Note: this is documentation for internal purposes only.
+> Despite much of the code being open-source, we do not offer any support or documentation for self hosters.
+
+# First Time Setup and Checking For Updates
+
+On the production/staging Windows servers, you'll find a powershell script `InstallUpdate.ps1` that 
+does a couple of things:
+ - Ensures the latest version of the importer is installed
+ - Defines the Postgres connection string, and how many service instances to stop/start (right now, just the 1 for prod)
+
+`InstallUpdate.ps1` can be run to both check for updates and install updates, and to perform fresh installs and configuring the service(s)
+The template for that script can be found [here](https://github.com/specklesystems/gitOps/blob/main/terraform/modules/windows-machine/templates/autoupdater/InstallUpdate.ps1.tpl) but needs to be tweaked per deployment.
+
+There's lot more to do with the windows infra/rhino licence config that's not covered in this readme document.
+
+# The Windows Service
+
+You can view it from the (search "services" in search), It should be running at all times.
+and can be stopped/started manually from the "services" menu
+
+It does not display a terminal, the best place to see logs is in our seq-dev instance.
+
+You can view error/crashes either via
+1. Event viewer - there is already a "Custom View" called "Speckle Rhino Job Processor"
+2. Reliability Monitor - Shows historical crash histogram
+   Note, the `Speckle.Importers.Rhino` crashes a lot due to Rhino.Inside behaviour, it's handled
+   crashes of the `Speckle.Importers.JobProcessor` are more serious.
+
+If you need to troubleshoot, it is still possible to manually start the job processor exe as a command line app, rather than as a window service
+this will give you back a terminal with all logs. But this is probably better done on the staging server...
+
+Because it's a Windows Service, it will start up with the Windows OS.
+If the process crashes (e.g. because it could not connect to the server/db)
+it will automatically be restarted, with a backoff policy defined in the `InstallUpdate.ps1` script
+
+If it's in a weird state where you need to manually restart it, this can be done from Services/task manager. Or simply by re-starting the machine.
+
+# Tricking the InstallUpdate script into running even when there's no updates
+If you want to make a change to the env vars of the service, or change the setup of the services in some way, it can be useful to run the script
+without there actually being an update.
+
+The easiest way to do this is to remove the registry key in `HKEY_CURRENT_USER\Software\Speckle\Services\InstalledConnectors`
+That way, the script assumes that there is an update when ran.
+
+# Debugging / Running Against a Local Server
+
+If you have a local Speckle server and want to test processing Rhino jobs.
+Firstly, there's a few things on the server you'll need to configure.
+I'd recommend using the docker-compose files in the root of the server repo.
+
+On speckle-frontend-2 set the envvar:
+```yaml
+    NUXT_PUBLIC_FF_RHINO_FILE_IMPORTER_ENABLED: 'true'
+```
+
+On speckle-server set the envvars:
+```yaml
+    FILEIMPORT_SERVICE_USE_PRIVATE_OBJECTS_SERVER_URL: 'false'
+    FF_RHINO_FILE_IMPORTER_ENABLED: 'true'
+    FILE_IMPORT_TIME_LIMIT_MIN: 30
+```
+
+Next, you can run the `Speckle.Importers.JobProcessor: Local Docker DB` launch configuration straight from your IDE.
+The `launchSettings.json` should already be setup with the correct connection string.
+It will run as normal CLI app, not a Windows Service, but aside from minor logging differences, this will work the same.
+
+N.b. you will find you are not able to easily debug the `Speckle.Importers.Rhino` project like this, because it's a spawned sub process.
+You have two options.
+1. Capture the command line args and call it manually from your IDE, bypassing the JobProcessor.
+2. Add a `Thread.Sleep(10000)` near the start of the entry point of the Rhino importer, and during the sleep time, attach your IDE to a running process.
@@ -7,27 +7,19 @@ namespace Speckle.Importers.Rhino.Internal.FileTypeConfig;
 /// Creates a headless doc and imports the file
 /// </summary>
 /// <remarks>
-/// Note: imported geometry will be converted to the default <c>mm</c> units
-/// If we need to preserve the file units, a custom config needs to be created
+/// Note: using OpenHeadless should preserve the original file's unit system for file types that have units
 /// </remarks>
-public sealed class DefaultConfig : IFileTypeConfig
+internal sealed class DefaultConfig : IFileTypeConfig
 {
  public RhinoDoc OpenInHeadlessDocument(string filePath)
  {
-    var doc = RhinoDoc.CreateHeadless(null);
-    try
+    RhinoDoc? doc = RhinoDoc.OpenHeadless(filePath, null);
+    if (doc is null)
    {
-      if (!doc.Import(filePath, null))
-      {
-        throw new SpeckleException("Rhino could not import this file");
-      }
-      return doc;
-    }
-    catch
-    {
-      doc.Dispose();
-      throw;
+      throw new SpeckleException("Rhino could not open this file");
    }
+
+    return doc;
  }

  public void Dispose() { }
@@ -0,0 +1,23 @@
+using Rhino;
+using Rhino.FileIO;
+using Speckle.Sdk;
+
+namespace Speckle.Importers.Rhino.Internal.FileTypeConfig;
+
+internal sealed class DgnConfig : IFileTypeConfig
+{
+  private readonly FileDgnReadOptions _readOptions = new() { ImportViews = true };
+
+  public RhinoDoc OpenInHeadlessDocument(string filePath)
+  {
+    RhinoDoc? doc = RhinoDoc.OpenHeadless(filePath, _readOptions.ToDictionary());
+    if (doc is null)
+    {
+      throw new SpeckleException("Rhino could not open this file");
+    }
+
+    return doc;
+  }
+
+  public void Dispose() { }
+}
@@ -4,7 +4,7 @@ using Speckle.Sdk;

 namespace Speckle.Importers.Rhino.Internal.FileTypeConfig;

-public sealed class FbxConfig : IFileTypeConfig
+internal sealed class FbxConfig : IFileTypeConfig
 {
  private readonly FileFbxReadOptions _readOptions =
    new()
@@ -16,20 +16,12 @@ public sealed class FbxConfig : IFileTypeConfig

  public RhinoDoc OpenInHeadlessDocument(string filePath)
  {
-    var doc = RhinoDoc.CreateHeadless(null);
-    try
+    RhinoDoc? doc = RhinoDoc.OpenHeadless(filePath, _readOptions.ToDictionary());
+    if (doc is null)
    {
-      if (!doc.Import(filePath, _readOptions.ToDictionary()))
-      {
-        throw new SpeckleException("Rhino could not import this file");
-      }
-      return doc;
-    }
-    catch
-    {
-      doc.Dispose();
-      throw;
+      throw new SpeckleException("Rhino could not open this file");
    }
+    return doc;
  }

  public void Dispose() { }
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Jonathon Broughton	79a6c42cc7	Improves geometry conversion performance Introduces caching mechanisms for fragment IDs and geometry to avoid redundant processing, significantly enhancing geometry conversion speed. Adds methods to clear caches and retrieve statistics for performance monitoring and memory usage estimation. Handles COM exceptions and invalid operations more gracefully, preventing crashes and improving stability.	2025-11-15 18:03:36 +00:00
Jonathon Broughton	e2318df87a	Adds COM object lifetime management utility Introduces a `ComScope` struct to automatically manage the lifecycle of Navisworks COM objects using RAII principles. This prevents memory leaks caused by unreleased COM objects, addressing a common issue with Navisworks interop.	2025-11-15 18:03:17 +00:00
Jonathon Broughton	78d7814351	Fixes RenderMaterials	2025-11-14 19:11:16 +03:00
Jonathon Broughton	17a320ee53	LFG!!! Matrix4x4 Transposed Adds an application ID to instance references.	2025-11-14 18:33:32 +03:00
Jonathon Broughton	396ef981ee	Fixes geometry processing for instance handling Refactors geometry processing logic to handle instances more efficiently. It now correctly applies transformations for single objects, ensuring accurate placement in the scene. Simplifies processing of transforms where necessary for single objects. Removes redundant logging.	2025-11-14 16:41:58 +03:00
Jonathon Broughton	763c413871	Adds instance geometry support to Navisworks connector Introduces instance geometry handling for more efficient and accurate Navisworks data streams. This includes: - Scoping the `InstanceStoreManager` to each conversion session. - Creating a "Geometry Definitions" collection to store shared geometry. - Adding instance definition proxies to the root collection. Addresses issues with duplicate geometry and improves stream performance.	2025-11-14 14:48:31 +03:00
Jonathon Broughton	57a5b41ec1	Refactors display value extraction Streamlines display value extraction by injecting the geometry converter. This change simplifies the DisplayValueExtractor by removing its dependencies on settings and logging. It now directly uses a GeometryToSpeckleConverter instance, which is passed in, for converting model item geometry.	2025-11-14 14:47:47 +03:00
Jonathon Broughton	8385532b96	Introduces instance store management Adds a service to manage shared geometry and instance definition proxies. This system uses two stores for geometry definitions and their instance proxies, facilitating efficient handling of shared geometry. It provides methods for adding, retrieving, and clearing geometries, ensuring deduplication and optimized memory usage.	2025-11-14 14:47:14 +03:00
Jonathon Broughton	e109515852	Implements geometry instancing for Navisworks Adds geometry instancing to improve performance and reduce data size when converting Navisworks models with shared geometry. It identifies shared geometries based on fragment paths, extracts the base geometry once, and creates instance references with transforms. This reduces data duplication and improves loading times in Speckle. Improves handling of COM array data for fragment ID generation and includes comprehensive logging for debugging instancing issues.	2025-11-14 14:46:54 +03:00
Jonathon Broughton	fdf2425ec6	Adds shared project file for Navisworks converter Introduces a shared project file for the Navisworks converter, promoting code reuse and consistency across different Navisworks converter implementations. This file includes common data extractors, data handlers, helpers, services, and settings, reducing duplication and improving maintainability.	2025-11-14 14:46:28 +03:00
Jonathon Broughton	c067cf6f91	Adds instance store manager for geometry Introduces an instance store manager to handle shared geometry, which includes separate stores for geometry definitions and instance proxies. This change prepares for the implementation of an instancing pattern compatible with .NET Framework. It also registers settings from a factory to resolve conversion settings.	2025-11-14 14:45:49 +03:00
Jonathon Broughton	60e26d85c6	Introduces shared geometry store service Creates a singleton service for deduplicating geometry during conversion. This service stores mesh objects, preventing redundant processing of identical geometries by leveraging application IDs. It uses a dictionary and a hash set to optimize lookup and storage, and includes thread safety mechanisms.	2025-11-13 14:17:50 +03:00
Björn Steinhagen	3876f7d220	feat(grasshopper): add model-wide properties to send/receive (#1162 ) * feat: adds model-wide props * feat: adds receive for model-wide props * chore: cleanup * chore: format * refactor: model properties to properties * refactor: props implement IProperties * chore: bump sdk * fix: add missing optional parameter to Receive2 mock setup in tests * fix: protection against multiple model-wide prop groups * refactor: reference point transfrom to root keys --------- Co-authored-by: Claire Kuang <kuang.claire@gmail.com>	2025-11-12 12:50:00 +03:00
Mucahit Bilal GOKER	d4ee1f2a55	feat(revit): add roomId and spaceId parameters (#1181 ) .NET Build and Publish / build-connectors (push) Has been cancelled Details .NET Build and Publish / deploy-installers (push) Has been cancelled Details * add roomId and spaceId parameters * clean up	2025-11-11 10:30:27 +03:00
Jedd Morgan	4f960cc670	readme tweaks (#1179 )	2025-11-10 13:52:43 +00:00
Jedd Morgan	1f63c1f8b3	Merge pull request #1165 from specklesystems/main chore: Back merge main -> Dev	2025-11-10 13:48:30 +00:00
Jedd Morgan	2ed9ffbca7	Use Openheadless for unit support (#1178 )	2025-11-10 12:53:55 +00:00
Jedd Morgan	d87b862e2b	add readme (#1173 )	2025-11-10 12:49:39 +00:00
Mucahit Bilal GOKER	3ad3ad2f01	feat(rhino): use existing materials when loading (#1177 ) * reuse existing materials * comment out purge material * fix: unnecessary using directives * more details in exception message and remove material purge. --------- Co-authored-by: Björn Steinhagen <88777268+bjoernsteinhagen@users.noreply.github.com>	2025-11-10 15:43:04 +03:00
Björn Steinhagen	6db7e46401	fix(grasshopper): refresh parameter UI when toggling empty properties mode (#1174 )	2025-11-10 15:07:57 +03:00
Björn Steinhagen	13fc24c7c7	fix(rhino): handles null active doc (#1180 )	2025-11-10 14:51:06 +03:00
Jedd Morgan	cf86158b83	Ignore (#1171 )	2025-11-03 12:57:17 +00:00
Jedd Morgan	bc18d3b494	fix(rhino-importer): Use main thread always for document creation (#1161 ) .NET Build and Publish / build-connectors (push) Has been cancelled Details .NET Build and Publish / deploy-installers (push) Has been cancelled Details * Use main thread * format * configure await false * pass args only once	2025-10-27 11:11:56 +00:00