[Cat966c]

Ok, now I'm frustrated. The Robert pnuematics I'm looking at don't quite extend as far as I need and the homemade hydraulics technique I'm working on didn't work, now that I'm trying to do pure brass, I can't find either the pipe (o.d. 1/2") or the o-rings at he hardware store and they told me they dont make the 1/2" od brass pipe or smaller even though I've seen it in person and on here! Also while trying to grind the threads down on a brass nipple (the last ditch effort in trying to get my way of doing it to work) the grinder sucked my finger down in to it and ground half my finger nail off. Yay. It's worth noting that the way I was trying it would have technically worked (grinding the threads down so that the cap wouldn't screw in until it reached the remaining threads on the pipe).
So I think I'm just going to do the final thing I think will work: get a piece of galvanized 1/8" and weld my own custom cap up to fit on both ends and voilà!