Understand that I haven't looked at the Knockout, so I may be completely off base. BUT... you might be able to do like I did with my 0200 and 0700: lay the blade over a socket, with the thumb-stud inside the socket, the socket supporting the side of the blade. Tap the thumb stud a few times with a hammer (preferably a brass hammer so if you make a mis-lick, you won't gouge the blade). On my 0200, a couple of fairly authoritative taps, and the thumb stud was out. Then it looks like it has a Spyderco hole in it, albeit too small to be useful. With my 0700, it took some serious whacks with the hammer to get the thumb-stud out.