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.
This robot uses custom length sides and 10 inch tires with IG52 285 RPM motors. We have included everything to make it ready to run including batteries, chargers, and a controller.
This is our LT2-F NIST qualified security robot with an enclosed robot chassis with rear flippers/stabilizers, camera tilt system, custom controller, video console, and battery charging station.