Hey everyone, I need a portable air tank for #Air Compressed Nerf Gun, you know, like a paintball tank? I'm trying to make it as cheap as possible, using pipe and materials from around the house. all i need is the tank, and i've only spent like $3 for the hose. The plan is to refill a old green portable propane tank with air. I know I'm crazy and am going to kill myself, and don't need any reminders. Before I try it, has anyone done this before?