Hello Michael,
Thank you. I did find importing with .step did not work well. Dimensions were wrong so I switched and imported with .iges which is fine. I now quickly save in .3dm

Here's my last and silly question.
Long1 is butted at F1 which is 3.0 wide. Firewall is 2.8 wide. How do I make Long1 fit at the firewall? presently has a .11 gap

ms