I found this diagram on an old thread. Wanted to pose the same question. OK I'm asking for opinions. Anyone that would like to give suggestions on the dimensions A B C D and E please feel free. I will have a 30" x 50" barrel. I want to put in 2 shelves. So door dimensions? Anyway the fire box will be either a perpendicularly mounted smaller propane tank or fabricated square box. Thanks to all in advance. Also, the size of the firebox.