I feel sorry for you man. Unfortunately, you learned the lesson the hard way. Guys, and girls I suppose (that would be an interesting poll topic), I'm sure we all "know" general gun (cannon,etc) safety rules, but following them is so crucial. You are very lucky, but like you said could have been so ...

Very creative... I like it. Nice use of your surroundings;) haha

How did the hose setup handle the recoil? Is that why you changed to the iron pipe fittings from the tank to the bottom of the "stock" for lack of better words?

for running a spark plug set up. would you use a grill igniter and wire it to the plug?

So i could run two bolts through the side of the chamber like in an advanced combustion set up and be fine?
To clarify on my over and under statement I made earlier. I meant run the chamber under the barrel not just the fueling system.

Got another question for the spudding gurus. With a metal chamber. Wouldn't an electric igniter/stun gun arc to the barrel in turn shocking the unlucky holder of said cannon.

Thanks. So the 2 piece metal with nut is literally called a union? I am trying to find parts on line and as you could imagine metal union showed a bunch of people in black clothing and random metal band names. lol

Thanks again for all of you guys help.

As far as the modified union goes. What parts are involved in that setup. And whats the difference between the two metering systems. I was planning on using ratcalc and fuel tool to help set up my metering.

Completely and utterly amazed by this hybrid. Very nice work. Machining, everything. Great Job.

I will probably go with a burst disk at first. As far as camlocks or screw unions go. Are there any particular stores that carry these? Ace hardware, Home Depot, Lowes? or a plumbing retailer? Or mostly just internet? I am in North Florida if anyone is near here and has somewhere they know of.

I would like to run a piston setup. But don't fully understand the concept of constructing one. Or the porting. So if there is a piston 101. I'd be willing to take some notes and give it a go. As far as the mix goes. 10x was a figure stating I don't need to be able to tell my friends I constructed a...

Could I run a over under design? Or is that a waste of power? Or unsafe?

Should I try to stick with a .6 to .8 to 1 c:b ratio?

So theoretically speaking run a 3in steel/malleable iron, chamber, to a 2.5" camlock, to a 2.5" barrel?

Just where you said "If you can afford it, go with a 2.5" or 3" valve." What valve are you talking about?