I recently won a battle bot competition but my weakest part of the robot was the drive train i have another competition coming up. the robot has a weight limit of 50 pounds and does weigh that. I am looking for a new drive train that is 4 wheel drive and gets lots of traction, power, and manuverbality. I don't need much speed as the arena isn't very big. the robot has a size limit of 4 foot by 4 foot by 4 foot. also i don't want any motors over 24 volts. thanks please ask questions if you have any.