First off let me just say hello to everyone, seems like a nice community here. I am going to attempt to build a reverse flow smoker and have a few questions. Not sure exactly how many gallon tank my smoking chamber is, all it says on the tank is T.W 192, its 20"dia by 52" long. The fire box I was going to use is a 7 gallon tank, 12"dia by 19". Will this work for a fire box? or is it to small? Also both my tanks did have propane in them. I have removed all the fittings and filled them with water till they over flowed. They should be safe to cut now?