Okay I know this has been covered at least 100 times. I have been looking at all sorts of set ups the last two hours (searching ck5, yahoo, pirate). I think I am just as confused now but I know what I am confused about. I understand the CO2 regulator thing, the special hose thing, and the lighter Al tank thing. Where is a good place to buy an Al tank. I found a couple of new 20lb tanks on ebay. Will that one work. The seller states it has a male fitting for CO2 regulators and then says something about it being for draft beer regulators only. Is this worht buying? Can I make it all work with air tools and tires? Is there somewhere else to by an Al tank that works for a similar price? (AZ guys speek up please) I want an Al tank so I can get it out of the truck by myself (I am 5'6" 150lbs). I plan on using it for air tools and tire duty on my 37's. I want the 20bl for the extra capacity (my rig is a 2 seater 6000lb 1 ton k5 so space and weight are not an issue).