I am located in Mono, Ontario, Canada and all of this "smoker" stuff is totally new to me! I love welding and I happen to have a small tank at my disposal. The main cooking chamber grill will only be 12" deep by 24" long. From what I have been reading here, I will be going with a reverse flow design. I realize no self respecting Southern man would even be bothered with a little smoker like this, but for my first go at it, it should work! The tank is about 12" diameter by about 32" long. I'm thinking of using a 20 lb. Propane tank for the fire box. It is a work in progress and I plan to keep reading and learning while I plug away at this project! Thanks for all the great info I have seen so far!