Quoted from gwynners:
I have a loose shooter...its because the square section shaft has been worn by the guide metal into almost an hourglass shape. The thing is, i cant find that square section shaft to remedy it!
bend the retaing piece forward slightly this will decrease the size of the square hole the shaft travels thru. don't bend it too far as to impede movement of the coil shaft just enough to minimize left to right movement when paddle is in resting position. hope this helps.