One thing that I did notice about the Mar beta is that imports work much better than in the other two.

There were several models, some SW native others IGES & STEP, that I had to play with in MoI 2.0 because the V3 beta would not open them.

Mar 18 release runs perfectly on that regard. I don't know if you actually worked on the import engine but something that was done made the import file work much better for me.

mjs