diff --git a/Connectors/Navisworks/Speckle.Connectors.NavisworksShared/Operations/Send/NavisworksRootObjectBuilder.cs b/Connectors/Navisworks/Speckle.Connectors.NavisworksShared/Operations/Send/NavisworksRootObjectBuilder.cs
index 7f5b3fc6c..9297b38af 100644
--- a/Connectors/Navisworks/Speckle.Connectors.NavisworksShared/Operations/Send/NavisworksRootObjectBuilder.cs
+++ b/Connectors/Navisworks/Speckle.Connectors.NavisworksShared/Operations/Send/NavisworksRootObjectBuilder.cs
@@ -1,4 +1,4 @@
-using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging;
 using Speckle.Connector.Navisworks.HostApp;
 using Speckle.Connectors.Common.Builders;
 using Speckle.Connectors.Common.Caching;
@@ -366,13 +366,13 @@ public class NavisworksRootObjectBuilder(
     {
       var groupKey = kvp.Key;
       var geometries = kvp.Value;
-      var groupKeyHash = groupKey.ToHashString();
+      var groupKeyPath = groupKey.ToPathString();
 
       var defProxy = new InstanceDefinitionProxy
       {
-        name = $"Shared Geometry {groupKeyHash}",
+        name = $"Shared Geometry {groupKeyPath}",
         objects = geometries.Select(g => g.applicationId ?? "").Where(id => !string.IsNullOrEmpty(id)).ToList(),
-        applicationId = $"{DEFINITION_ID_PREFIX}{groupKeyHash}",
+        applicationId = $"{DEFINITION_ID_PREFIX}{groupKeyPath}",
         maxDepth = 0
       };
 
diff --git a/Converters/Navisworks/Speckle.Converters.NavisworksShared/DataExtractors/DisplayValueExtractor.cs b/Converters/Navisworks/Speckle.Converters.NavisworksShared/DataExtractors/DisplayValueExtractor.cs
index ec721dac1..8abea029d 100644
--- a/Converters/Navisworks/Speckle.Converters.NavisworksShared/DataExtractors/DisplayValueExtractor.cs
+++ b/Converters/Navisworks/Speckle.Converters.NavisworksShared/DataExtractors/DisplayValueExtractor.cs
@@ -18,6 +18,6 @@ public class DisplayValueExtractor(
   /// <summary>
   /// Gets the underlying geometry converter for accessing cache statistics.
   /// </summary>
-  internal GeometryToSpeckleConverter GeometryConverter { get; } =
+  private GeometryToSpeckleConverter GeometryConverter { get; } =
     geometryConverter ?? throw new ArgumentNullException(nameof(geometryConverter));
 }
diff --git a/Converters/Navisworks/Speckle.Converters.NavisworksShared/Paths/PathKey.cs b/Converters/Navisworks/Speckle.Converters.NavisworksShared/Paths/PathKey.cs
index 2fe1b2ab4..4eaf89f6d 100644
--- a/Converters/Navisworks/Speckle.Converters.NavisworksShared/Paths/PathKey.cs
+++ b/Converters/Navisworks/Speckle.Converters.NavisworksShared/Paths/PathKey.cs
@@ -1,4 +1,4 @@
-namespace Speckle.Converter.Navisworks.Paths;
+namespace Speckle.Converter.Navisworks.Paths;
 
 public readonly record struct PathKey
 {
@@ -84,21 +84,9 @@ public readonly record struct PathKey
     return true;
   }
 
-  public override string ToString()
-  {
-    if (Data == null || Data.Length == 0)
-    {
-      return string.Empty;
-    }
-    return string.Join(",", Data);
-  }
+  public override string ToString() => Data == null || Data.Length == 0 ? string.Empty : string.Join(".", Data);
 
-  /// <summary>
-  /// Returns a compact string representation using the hash value as an unsigned integer.
-  /// Suitable for use as application IDs and definition IDs.
-  /// This avoids negative numbers in IDs by treating the hash as unsigned.
-  /// </summary>
-  public string ToHashString() => unchecked((uint)Hash).ToString();
+  public string ToPathString() => Data == null || Data.Length == 0 ? "0" : string.Join(".", Data);
 }
 
 internal sealed class PathKeyComparer : IEqualityComparer<PathKey>
diff --git a/Converters/Navisworks/Speckle.Converters.NavisworksShared/ToSpeckle/Raw/GeometryToSpeckleConverter.cs b/Converters/Navisworks/Speckle.Converters.NavisworksShared/ToSpeckle/Raw/GeometryToSpeckleConverter.cs
index 79bd99506..5f20b4eed 100644
--- a/Converters/Navisworks/Speckle.Converters.NavisworksShared/ToSpeckle/Raw/GeometryToSpeckleConverter.cs
+++ b/Converters/Navisworks/Speckle.Converters.NavisworksShared/ToSpeckle/Raw/GeometryToSpeckleConverter.cs
@@ -108,10 +108,10 @@ public sealed class GeometryToSpeckleConverter(
             var transformedWorld = _isUpright ? instanceWorld : TransformMatrixYUpToZUp(instanceWorld);
             var invDefWorld = GeometryHelpers.InvertRigid(transformedWorld);
             var definitionGeometry = UnbakeGeometry(geometries, invDefWorld);
-            var groupKeyHash = groupKey.ToHashString();
+            var groupKeyPath = groupKey.ToPathString();
             for (int i = 0; i < definitionGeometry.Count; i++)
             {
-              definitionGeometry[i].applicationId = $"{GEOMETRY_ID_PREFIX}{groupKeyHash}_{i}";
+              definitionGeometry[i].applicationId = $"{GEOMETRY_ID_PREFIX}{groupKeyPath}_{i}";
             }
 
             _registry.StoreDefinitionGeometry(groupKey, definitionGeometry);
@@ -123,10 +123,10 @@ public sealed class GeometryToSpeckleConverter(
             var transformedWorld = _isUpright ? instanceWorld : TransformMatrixYUpToZUp(instanceWorld);
             var instanceProxy = new InstanceProxy
             {
-              definitionId = $"{InstanceConstants.DEFINITION_ID_PREFIX}{groupKey.ToHashString()}",
+              definitionId = $"{InstanceConstants.DEFINITION_ID_PREFIX}{groupKey.ToPathString()}",
               transform = ConvertToMatrix4X4(transformedWorld),
               units = _settings.Derived.SpeckleUnits,
-              applicationId = $"{InstanceConstants.INSTANCE_ID_PREFIX}{itemPathKey.ToHashString()}",
+              applicationId = $"{InstanceConstants.INSTANCE_ID_PREFIX}{itemPathKey.ToPathString()}",
               maxDepth = 0
             };