QA upper control arm

May have been covered before, but couldn't find it. Just installed a set of QA1 upper arms purchased from a member on my 73 Sport. I really like them but have a question. Should I ever need to replace the ball joint, what tool do I use? I have the special socket that PST sells and I used it on my stock arms. That tool has sidewalls that are too thick to fit the QAI arm. Anyone have their method? Thanks.