I did the one way bearing idea... bearing fell apart on a big impact... the loading for a one way bearing is alot lower then that of a normal one of the same size... little spinner do ok but they have quite a big gear ratio after the bearing so less loading on it...

Im using the toothed drive pulley on the motor, smooth pulley on my drum option at the moment in 720, and ive tried quite hard to break it and i havent... only thing thats broken are drum teeth and a motor coming loose because i didnt loctite it up.... you'd be suprised how easy it is to tension it trev, just make it so if you hold the disc... you can turn the motor output shaft by hand and it spins the belt, but with a bit of friction...

Also adding additional capacitors to the esc really helps, ones with a low ESR value- lots of information on this on the web if you google it.

Did consider having a contactor inline with the motor/esc but it just seems a lot of weight for something with the right current carrying capability that can be overcome by something else.

Also; dont mount the esc properly lol.. sounds daft but everytime i have the big impacts have damaged it...LS4 found the same... wrap it in foam and cable tie it down so its got some movement.