Or use a dependency graph where the operation are, umm, dependent on the specific geometric component parent. When something gets changed just go and find the

Or use a dependency graph where the operation are, umm, dependent on the specific geometric component parent. When something gets changed just go and find the place where the graph is bonkers and rebind the sub-tree to the correct parent object. Could even have a fancy auto-generated UI à la Blender's node editor.