I have a Kreg machine, which may have actually been a very early prototype of the Foreman. It's all air, built around an inline Sioux drill. It's even got 80/20 extrusions as the fence and cylinder holder. One stomp of the foot pedal actuates the clamp, engages the drill,and unclamps just like a Castle. Best of all it's a table top model that is easily stashed away. I'm not sure how much air it actually uses but I drill a lot of holes before my 80 gallon compressor kicks?in.