When working on the CheckerBot I needed to come up with a way of picking up the checkers. My solution was a pneumatic claw. Below is the original compressor that I used on the CheckerBot. I originally tried using two of the small pumps. It worked fine as a compressor but it didn’t not move enough are and there was not enough torque once there was high air pressure. If I would rebuild this one I would change two things. I would have a lower gear ratio, this one has a 3:1. And I would have the clutch turning with the pumps not the motor. Below are some pics of it.