So I built my first bike and am about a half tank through it. I used the manic mechanic hub adapter on the bike. When I roll the bike the chain goes from a nice 1/2" of play each side to about an inch of play each side as the wheel rolls. I take it that something is out of alignment. With the manic hub what should I check? Could it be the motor gear? Where do I start? To the eye it looks to be nice and straight.