I am in the process of making my own "Power tank". I found a free 20lbs C02 tank at a local recycler. Has anyone done this? Any thoughts or recommendations from your experiences? I am trying to decide what Regulator to go with and the best place to mount it on my LJ. I was thinking on the tire swing, I have a Hard Rock bumper and swing. Any thoughts, pics or even wild ideas would be appreciated. Thanks for the help.