[elmer_fud]

I was also thinking you could do this with 2 valves with differn't sized orifices. If you did it right you would be able to get 3 differn't air flows resulting in 3 kicking forces.

doing it this way would result in 2 differn't air flows. If you open both valves at the same time you could get a third air flow. The differn't air flows will result in differn't kicking speeds.