Hi we also had some problems with getting the roll pin into the output shaft. It broke in the hole and we had serious problems getting it out

We fixed it with brute force and now it's in position.
But i need your help. One of our gearboxs is rattling when we run the motor. The large cluster gear is knocking against it's bearing and making a bad noise. We've greased it up and done several refits. Any suggestions?
PS anyone going to the florida regionals?