So, I am a long time lurker from TX I have built two pits so far. First was a 120 gallon trailer mounted offset. The second was dubbed the cockpit had an offset centered firebox on an 80 gallon compressor tank. I gave the cocpit to my father in law and now am am wanting to build another pit. I have decided on reverse flow. I have a propane tank that measures 18in by 38in. I want to use that for my smoke chamber and build a square firebox out of 1/4". I find that I am often smoking something and want to cook something on the pit at a different temperature than I am smoking. So I am thinking about building a reverse flow with two chambers (18#30"propane tanks) side by side connected to one firebox. To control tempature differences,I would put a dampe in-between firebox and smoke chambers. Attached is a picture of my idea as well as a picture of the "cockpit" what comments or concerns do you have about my design? The cockpit Tank on the left is what I want ato build the smoke chamber out of. I can another for the other chamber.