Hi, Mip, thanks but coming from Fusion 360, my only viable options are Step and Iges.

I noticed exporting multi-component assemblies from F360 fail with Step so I'm mostly using Iges now.

MoI doesn't have a Y/Z flip for that format (without resorting to INI edits), that's why I was advocating a generic flip for all the supported import formats right on the import dialog itself...

-Will