We recommend using the M4 steel mounting screw to mount IG42 motors. We use these in our IG42 DB Robot Platform when mounting through two 1/8" thick plates.
The Micro Maestro is the smallest of Pololu’s second-generation USB servo controllers. The Maestros are available in four sizes and can be purchased fully assembled or as partial kits.
The HD2 tracked platform is a large, heavy duty tracked robot with the power to pull a truck and climb stairs. A wealth of internal space allows for batteries, controls and an optional computer.