Hi Przemas, so for doing a script right now it's easiest to modify the current Trim command script to delete cutting objects and do a join at the end. I've attached a version that does this.

The delete part is from this added line:

	moi.geometryDatabase.removeObjects( cutters );

and the join is from this added part:

	var join_factory = moi.command.createFactory( 'join' );
	join_factory.setInput( 0, newobjs );
	join_factory.commit();

Does that then do the boolean stencil function you want?

- Michael