Brushless Buggy ?

[MetalMan]

I'll chime in here too.
Elsewhere the use of a hardened steel pinion being used with a steel spur gear has been determined to not be a good thing. There is nothing better than to use a plastic spur gear. You get lower weight, less rotating mass, and something that wouldn't lead to a problem for both the pinion and spur (if the spur gear got stripped).