Thanks ED I have only covered the basics of pneumatics in collage using compressed air I guess for now the bike pumps will do as its only my first proper robot, before I built this one I just used to put a wooden body shell over my RC car and then wire up a 12v motor with a blunt cutting disc on it.

I got a feeling that I properly design a co2 system for my next robot and then one day I might start attending live events