Originally Posted by markjenn

I've never had any issue with removing the fixed cup using the "vice trick"... using a vice to hold the fixed cup and then turning the frame around the cup. The frame gives you tremendous leverage. But you REALLY want to be sure you're turning the right direction, you need a machinists vice with clean and square jaws, and you want to make sure the vice is grabbing the flats perfectly. You may only get one chance.

- Mark