I'll have to check those pinions. I'm running the turnigy 4S batteries. The ones in the photo are my 2S packs that I run in the slash. Had to get the car going while I was waiting for the 4S packs to turn up.

I've got a question for you robrc12. How does the car handle? It just seems to have a lot of weight in the rear. And what kind of runtimes are you getting on the 4S? Ran mine at the track over the weekend, and got around 18 mins.