Originally Posted by Teufel Racing

Had the same issues with the stock ball Cups from AE, don't know what they changes, but they're not as good as they used to be. IMO. I've seen the JC ones used, the RPM's, and if you can find them the old white Losi XXX Ball Cups. All are better than the stock ones.

If the Ball Cup keeps popping off when trying to adjust the rod, try putting a little greese on the threads when you first put the cup on the rods, seems to help with that issue.