Tracked Chassis for Smartibot

A tank chassis, based on the SMARS modular robot, that uses the circuit board, motors and battery box from a Smartibot Kit. It uses two 608 size bearings in the idler wheels (8mm core, 22mm outside diameter, 7mm width, the same as used in skateboards, roller skates etc). Use steel ones if you have them or 3D print some of these: https://www.thingiverse.com/thing:4821342