[F1END]

I am on a tight budget and I have the alloys on the front and the carbon-reinforced ones on the back. Had to get a new lot of A-parts anyway for the diff-covers, so figured I may as well get the carbon ones and changed those bits too. Hasn't happened to me since. When I have more money, I'm gonna get the alloys for the back too, but I'd rather save up and get some trf dampers first.

The problem with the kit bits is that they are soft and flexible, so they 'give' and the ball pops out. The alloys (and to some extent, the carbon-reinforced ones) flex less and don't give, so the ball stays in.