Any experience fixing loose pivot point on the swing arm-bb connection? This bike is terribly wobbly because of the play in this joint. the two pinch bolts also seem to be secured by slot-head screws, one on each side, inside AND outside on each side. But the inside slot head screws are virtually inaccessible. Regardless, I can turn the pinch bolts but haven't done so to the extent to hopefully remove the pivot bolt. I'm hoping to find a worn out bushing in the frame. Any comments welcome.