I haven't heard of any issues with the rw idlers (AR28T) even when using the std spur gear and 6.5t motors
but the alloy idlers are a tad noisey
__________________

Website:
http://www.wbmcc.co.uk/bingham-model-raceway.html
Schumacher Cat Xls, Rc10 Team(retired), Mardave Cobra, SST 98 Rally Car, TT02 Rally car, Wpl-c24 and Element Enduro builders kit #71 #deaddogracing
Autocare, unit 5 candleby Court, Cotgrave NG123RT.