Thanks for the input, yeah its a little bit confusing the way i drew it up but it was a quick write up. As for the gauges, the Y blocks im using have a gauge port and instead of buying plugs i paid 10 bucks more and got gauges. The autometer gauge i have is to make sure im not losing pressure with the nitrous application. I originally planned on running braided stainless lines throughout but the cheapest I can get it is a 4 bucks a foot. ( I might still do that). As for the vent line, there is a roll over vent built into the fuel cell. Also im running all 3/8 in hose.