Hi Andrei,

> I tream a bit diffrent way.. and get that hole hm.. What is the case?

If you are trying to trim with the entire object as the cutting object, MoI will likely be trying to do some surface/surface intersections as part of the cutting operation, and like I was mentioning before in this kind of situation with "barely skimming" surfaces you don't want to do surface/surface intersections.

So instead select edge curves as the cutting object, rather than selecting the full object as the cutter. That should avoid any surface/surface intersections from being done at all.

That's how I did that previously attached file - for the cutting objects I selected all the naked edges (by using the select naked edges script), not the entire object and not both objects as a "mutual trim" either.

- Michael