Hi,

The ball-link idea is a good one. I don't use the Dubro stuff because I find the plastic too inconsistent. Sometimes, it's too brittle--sometimes too soft. I use the ball-cups and ball-ends from the RC car side of the hobby shop. There are several aftermarket ball setups that are very beefy and the ball stud is hardened steel. There is no binding at all, and they're not coming off in flight. Good luck!