Hello to all. This forum is great, and has provide me with some good ideas and facts. I am currently building my new Trailer smoker, and am in need of some advice. I am building an offset horizontal with tuning plates, and leaning toward reverse flow. I have built a couple rookie offsets, and always had probs regulating temps. Thanks to the great pit ratio calculator, I think this new one will smoke the first couple, so to speak, and am well on my way. My latest debate is whether or not to build a vertical smoker chamber on opposite end of firebox. I would really like to have the extra room for multiple racks for ribs and such. My horizontal smoking chamber is 90" long, 30" diameter, 24" x 29" x 29" firebox. The cylinder is 1/4" steel, the firebox will be 1/2". any advice on adding/or not, the vertical box. Is it feasible to use both chambers at once? I would love to be able to add ribs in the morning after a long drunk night of butts and brisket, without having to make room. Chances are, I will be cooking alot. Any and all suggestions will be appreciated.