Well I got some really disconcerting news. I picked up a Smittybilt CO2 tank at truckfest, this past summer. I was calling around trying to find a place that would fill it. One place told me that they would NOT fill any Smittybilt CO2 tank, because they are not sure the tank is certified properly, and have heard about the regulator blowing out on them. He told me that PowerTank, in Calif. is doing some testing on these Smittybilt CO2 tanks. So, to me, it sounds like the Smittybilt CO2 tanks may have the proper stampings on them, but they may be bogus. Now I'm second guessing my choice of getting this tank in the first place. Maybe I should just return the dang thing.