We recommend using the M5 steel mounting screw to mount IG52 motors. We use these in our Custom Length IG52 DB Robot platform when we mount the motor to the chassis through two 1/8" thick plates.
This is a fully assembled LT2-F robot platform. It is our second generation of the LT robot. It is the same chassis and has the same mechanical components as our tactical LT2-F robot. The LT2 is lighter than the HD2 treaded robot.
SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader.