Anyone have a source and/or experience with spin-on prop adapters (so we can use the legacy props with the P4)? Why? - The P4 props are hard to balance and even after they are balanced, there is no way to ensure the prop is truly centred on the motor axis - The strength of the 3 tabs of the P4 prop mount is not confidence-inspiring and the springs do not hold the props as tight as I think they should Side note: Does anyone know if the ESC's can supply reverse voltage to the motors? I am assuming they can't. If this is the case there should be very little (aka no) loosening tongue on the screw-mount torque. (from an engineering aspect the screw-mounts are pretty near perfect).