I have a Histop Heavy duty coaster rear wheel with the manic mechanic adapter on it and somehow the wheel keeps going out of true after about 50-75miles. I could imagine this happening with a rag joint but with the MM adapter i havn't a clue as to what would be causing this? I've even broken 2 of the 12gauge spokes on it. one on the left side about 12 o'clock and one on the right side at about 6 o'clock both had the little end at the hub broken off. Anyone know what could be causing this to happen?