Check you flybar and make sure the paddles are equal length away from the head. What I did was take the paddles off and centered the flybar. Then I screw on till it was tight and facing the right way and measured the distance between the paddle and the collar. I then put the other paddle on and set it at the same distance as the first paddle. If you still have minor vibration you might want to weigh each paddle to make sure there not out of balance themselves. A small amount of scotch tape on the lighter paddle should help bring them into balance. Using a digital scale here works wonders.