Please please please post details about your propane meter, I am hung up on this part of the project and yours looks really nice. what parts did you use and where did you purchase them?

So I never really got around to building the truely beastly spudgun i always imagined buildng, and now that I'm older I think its time. I know most of the designs for my gun by heart but I need help with the parts that go from the propane tank to the chamber. What parts do I use? Where can I get met...