I don't think that's such a slick good idea (pun intended). I'd be concerned that might make it too easy for the props to fly off during braking, and as a result over tightening to compensate for that concern. It's such small annoyance that I'm good with it, I just accept that on my unit, black motors have a different screwing persona than silver.Hmmm... Yea I meant use the emery on the motor it was late. It's a simple thread fix for any threaded motor.
Another idea just ran through, has anyone tried graphite on the threads?