Well 384's and 1086's shooter uses 4 Bimba Pistons (i dont remember the technical information but you are welcome to drop by in Atlanta if you are coming to the nationals) that are supplied by 4 Clippard Tanks filled up by our compressor. We have set up our pistons as the hypotenuse of a triangle, the base we adjusted until we got the best horizontal and vertical distance. If you want a pic of the set up check out this link:
http://virginiafirst.org/FRC/2008/pr.../target50.html
(You could see the bimbas and the clippards)
