I am sure that the first round smokers were a matter of convienience because a pipe or tank was available and required less construction. In my case I buy from a scrap yard and a pound of steel all costs the same. My scrap yars has a great pile of nearly new plate steel and I haven't seen any horizontal chambers that were rectangular. I plan on a build that will use all plate with a square fire box and a rectangular RF cooking chamber. I want to make the doors cabinet style so when they are both open you could easily put a large (hog sized) piece in it. Any ideas greatly appreciated, I have built a number of ugly and not so ugly rigs in the past. This time I want to go bigger and have it work well.
Beer is a constant reminder that god loves us and wants to see us happy.