the nylon spurs work just fine as long as you have good gearmesh. also, things would be much longer lasting if you go mod 1 or mod .8 (32p). I did this mod on the vader with a savage 46t nylon spur, and a rc-monster 5mm bore pinion, and if needed, Mike makes a shaft reducer so you can use a 5mm pinion on a 1/8th inch motor shaft