I picked up a used RCBS Jr. 2 a while back and I'm doing a rustoration. I got the set screw unfrozen that (I am pretty sure) holds the primer cup and spring in place on the arm. I need to find a small primer cup at some point to complete it. But my question today is how do I get the large primer cup off. I know from some research the Jr's were all basically the same, but some primer cups pulled out and some screwed out. This one doesn't seem to want to do either. Is there a trick or am I missing something obvious? Thanks.