RE: Belt CP Spinning Help!
The belt is a good kopter. I'm sure your just having some mechanical issues. Dont know if this is correct or not,but to check the belt tention,I just take a small screwdriver or something and push on the belt itself wherever you can find a spot. There should be some slight resistance.Not so much that it wants to stretch the belt,but not too little that its flopping around. It COULD be that your gryo is junk,but I highly doubt it. Its most likely your servo just needs moved front or back. And I also highly doubt you need to move the ball on your servo arm.
Like Jmann said....which way does it want to rotate?