Nitrous refill stations
I'm tired of paying $85+ to have my nitrous bottles filled. Unfortunately due to the US to Canadian exchange a new refill station by NOS, Cold Fusion, Zex or another manufature is expensive (easily $1000+ by the time I add in freight, duty, and taxes).
I've decided that I want to build my own. I've got lots of hose, so that's not a problem. A scale is easy to get, as is the air/water filter and the valves. The question I have is about the pump. Has anyone built their own and how has it turned out? Do you have pump specs or a part number I can use?