I built this axle out of broken parts in about 15 minutes. It scoots around fairly quick on 5 volts and has plenty of torque. The actual axle is from a fried zip-zap monster truck that has been cut up a bunch and has had the 4 wheel drive driveshaft removed. The motor is a servo motor and the esc is a modded servo board from a stripped servo. It is fully proportional with forward and reverse (no brake). I still need to shorten the motor wires. Eventually I want to add a micro servo for steering and run everything off a rechargable receiver pack, maybe fit everything under a model car body and give it to my brother as a b-day present. Yes I'm cheap Just thought Id show you guys, and opinions are always welcome.

Edit: Sorry for the blurry pics, this camera doesnt have a macro mode.