I agree with the liability on the blowgun pressure,
currently the sprinkler valve is fine, I have yet to experiment with qev's. I'm currently planning on a 2" piston, only problems are:
Budget (saving for car)
Must be in a metal housing
withstanding 200psi

the planning i'snt as hard as actually ...

Full body shot has been added, Thanks for the comments guys.

@noname: I've researched piston valves for a while, and i'm planning a metal 1" in the future, however, building your own valve requires definite planning, and I am going to take my time, for this gun, the speed and volume dump of the ...

Hey everybody, I've been reading spudfiles for a couple of months. From browsing the forum i've seen that this forum is nicely run. Anyways this forum is for new cannons, so without further adieu;

Iron/Steel/Copper Sprinkler Valve Pneumatic:
http://i221.photobucket.com/albums/dd314/Bradst4 ...