@Jon_Mirtschin It would be very cool to have a GeometryGym package for Dynamo. I don’t have too much experience with making ZT nodes but I did experiment with importing the IFC Engine DLL a couple of years ago. What worked for me in terms of cleanup was the following: I created a wrapper class that would reference the DLL and only contained references for those methods I wanted as nodes (declaring them as public, of course).