Underneath the Bottom Base

These motors are 131:1 Metal Gearmotor 37Dx73L mm with 64 CPR Encoder. They should be enough to carry the frame of Fetch along with the arm, controllers, laptop, kinect sensor, and electronics. The wheels are polulu 90mm black wheels and while they are not in the shot there are also a couple of casters from Lowe's to make sure Fetch stays upright.