So as I said, it is not normally user error. These motors are suppose to handle hard bashing and fast racing. There's no way tightening a screw would strip it out when it can withstand not budging with all the other mayhem. And if its a local hobby shop that is selling the product they will more than likely always swap the part out and they will deal with the manufacture. Manufactures are more willing to give a dealer a new part rather than a customer unless the customer bought it straight from there website..