Thanks Michael I will send it to you but I should prepare it before because it`s not prepared to imitate a real problem. I need to change cutters. It takes some time (I`ve already tried this few months ago). Some cutters are not in subd because my production was pure polygonal. I need to change it and then I will try to do that test properly. Next I will send it to you. Thanks it`s very kind that you want to look at it.

Those triangles is a background scan :) (it`s not related with import subd meshes to MoI)

From that site it looks that is a rather subd conversion to cad than triangle mesh 2 cad: http://www.resurf3d.com/Objmesh2solid.htm (please look on images).

Thanks for all info. Thanks Michael also for that Rhino plugins link.