What kind of switch is it? Meaning push, twist, etc... looks like a twist one for a lamp.

Yeah, I really need to finish this MHS tutorial I was making... The heatsink always changes where the blade holder fits. It has to be slightly thicker than the spot in between the threads otherwise it wouldn't clamp on it. Thus the last thing I always do is drill a blade holding screw last. If you don't it's usually like 30-45 degrees off when assembled.