[dude__hi]

We finalized our kicker today. we're using a 1.5 in bore 8in stroke pneumatic piston. We're using a gate latch to keep the rod from extending when pressurized then opening the latch gate to release all the force at once. We're adding a spring to further increase the amount of force output.

http://www.youtube.com/watch?v=QLH-XqNyQ-0

These are the early prototypes. The recent ones are more complete and don't need people to reset them or hold them in place. The video displaying the final design for the pneumatic shooter we settled on should be up today or sometime tomorrow.