I don't tighten the P3 props any more than I did my P2, the P3 has a double torque speed 'bump' at start up to insure the props are secure. 41 flights as of yesterday and the props are fine, they come off after each flight as the foam in the case is very dense, making the lid hard to close with the props on. At $6 a pair I am not going to *****, if you ever flew a real A/C and had a A&E Tech charge you $500 for a $90 alternator just because if was 'certified' you wouldn't gripe either. I have never had to use the provided wrench to remove the props as just holding the motor works just fine, and is faster.