Hi Andrei,

> You mean second surface only for hole? Or for area around it to?

The second surface is for the "side walls" of the hole - it would stick out and intersect the outer surface and you'd trim both surfaces with each other.

Then the area right immediately around the outside of the hole comes from filleting.



> This is not clear for me.

Basically cutting a chunk away from a larger block with a curved cutting surface something similar to this:








- Michael

Andrei:first a big loft to cover whole rifle
than imagine red and blue area like a single part to subtract (seems like a big sharp ellipse)
after subtract you can do handle and trigger also subtracting from previous shape
just a quick idea..
M

Thanx guys, I'll try)