Late to this thread, but wanted to add a different angle.The Property Manager approach described above is the right answer when you need custom expressions — derived areas by surface material, conditional counts, project-specific logic. That flexibility requires the setup ti...

Great thread — the property set approach you're describing is a solid pattern for keeping QTO data model-native and avoiding double-entry.One thing worth adding to the conversation: if the goal is specifically a client-deliverable from the IFC file without building a schedul...