I've redesigned the gun to use an off-the-shelf dual acting air cylinder. This will save me a good deal of time and provide for a wider range of operable pressures. The only mechanical part I still have to make myself is the trigger valve, which will have to be made from 3/4" Nylon Hex Bar.
I may start a completely new thread once construction starts since the new design is so different from the original one.
Edited by CaptainSlug, 20 September 2007 - 02:49 PM.