On my comp-arf 2.6 330L I used 4/40 clevises on the elevators and ailerons because the manufacture said ball joints create a dangerous side load on the phenolics or something along those lines. Yet I have seen many planes of that style on the net with nothing but ball joints. What's right/wrong? I'd love to get rid of the clevises they get sloppy quick in the phenolics. Plus get rid of the phenolic servo arms they supply and replace them with aluminum.