I agree,short burst welds are going to be ok,after all,this is not a strength issue. Doc is right,EVERYONE leaves the gas off.I would add that only an idiot would leave the gas on,I lost a full cylinder of oxygen this summer and when I needed it on a Sunday, it was a lesson well learned. Stan in Montana ______________________________________________________ Click here to donate to the Hurricane Katrina relief effort. http://store.yahoo.com/redcross-donate3/