diff --git a/speckle_connector_3/src/convertors/to_speckle_v2.rb b/speckle_connector_3/src/convertors/to_speckle_v2.rb
index a243f31..0b83198 100644
--- a/speckle_connector_3/src/convertors/to_speckle_v2.rb
+++ b/speckle_connector_3/src/convertors/to_speckle_v2.rb
@@ -105,9 +105,6 @@ module SpeckleConnector3
 
       # @param entity [Sketchup::Entity]
       def entity_has_changed?(entity)
-        # We do not necessarily consider grouped meshes for caching?
-        return false if entity.is_a?(SpeckleObjects::Geometry::GroupedMesh)
-
         speckle_state.changed_entity_persistent_ids.include?(entity.persistent_id.to_s) ||
           speckle_state.changed_entity_ids.include?(entity.entityID.to_s)
       end
diff --git a/speckle_connector_3/src/sketchup_model/definitions/definition_manager.rb b/speckle_connector_3/src/sketchup_model/definitions/definition_manager.rb
index 13f1cc4..1c03ae9 100644
--- a/speckle_connector_3/src/sketchup_model/definitions/definition_manager.rb
+++ b/speckle_connector_3/src/sketchup_model/definitions/definition_manager.rb
@@ -102,8 +102,8 @@ module SpeckleConnector3
             grouped_meshes = faces.group_by { |face| [face.layer, face.material || face.back_material] }
             grouped_meshes.each do |(layer, mat), faces|
               material_id = mat.nil? ? 'none' : mat.persistent_id.to_s
-              grouped_mesh_id = "#{layer.name} - #{material_id} - #{entity.definition.persistent_id.to_s}"
-              grouped_mesh = SpeckleObjects::Geometry::GroupedMesh.new(faces, layer, mat, grouped_mesh_id)
+              # grouped_mesh_id = "#{layer.name} - #{material_id} - #{entity.definition.persistent_id.to_s}"
+              grouped_mesh = SpeckleObjects::Geometry::GroupedMesh.new(faces, layer, mat)
               flat_atomic_objects[grouped_mesh.persistent_id.to_s] = grouped_mesh
               definition_proxy.add_object_id(grouped_mesh.faces.first.persistent_id.to_s)
             end
diff --git a/speckle_connector_3/src/speckle_objects/geometry/grouped_mesh.rb b/speckle_connector_3/src/speckle_objects/geometry/grouped_mesh.rb
index 5c231b6..fd452cd 100644
--- a/speckle_connector_3/src/speckle_objects/geometry/grouped_mesh.rb
+++ b/speckle_connector_3/src/speckle_objects/geometry/grouped_mesh.rb
@@ -28,15 +28,19 @@ module SpeckleConnector3
         # @return [Sketchup::Material] material that faces belong to
         attr_reader :material
 
-        # @return [String] structured id for grouped mesh
+        # @return [String] fake id for grouped mesh
         attr_reader :persistent_id
 
+        # @return [String] fake id for grouped mesh
+        attr_reader :entityID
+
         # @return Hash{String=>Sketchup::Face}
         attr_reader :mesh_groups
 
-        def initialize(faces, layer, material, persistent_id)
+        def initialize(faces, layer, material)
           @faces = faces
-          @persistent_id = persistent_id
+          @persistent_id = faces.first.persistent_id.to_s
+          @entityID = faces.first.persistent_id.to_s
           @layer = layer
           @material = material
           @mesh_groups = {}