The standard front 10mm hex works great with the Tamiya wheels.. but they tend to be on the thin side for most of the B44 front wheels .. and rub on the webbing ... the DB01 wide tread hubs (54406) work best and work with all 10mm front hex wheels
Now some of the 12mm hexs I have posted up before work with the zx-5 and Losi 22-4 front wheels and they do not rub at all..
Now as for the picture of the speed control on the TRF503 instructions... that thing is a Brick!!!
