Quote:
Originally Posted by MathGeek
I don't know. I'm pretty sure I'll get close enough copying an existing pneumatic design.
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why not something like this?
http://potato-gun.wonderhowto.com/ho...azooka-316369/
its cheap, simple, light weight, and very portable and you don't need to drag air tanks around and it looks to have the power to get all the distance you need