jollyjumper,

That is a metal spur in there right now and the spur doesn't last long. You could go with the hardened steel pinions, but from what I hear, they don't last long either. I usually run a Kyosho plastic spur, but a rock fried my last one yesterday.

I'm running 4S Lipo. I have a couple of Kokam 4800mAh packs on the way, because the truck handles better with the light batteries. I usually run a 4S2P 8000mAh pack for runtime in the 30 minute range.