Hi, I signed up for these forums because I am looking for some guidance on a pit I plan on modifying. I'm from Texas. I spend many evening enjoying the aroma of my offset smoker, beer in hand, occasionally glancing at that thermometer. I love low and slow cooks. My bbq is enjoyed by my wife and 3 kids, and they are quite the critics. I sent this message to bbq fred, because I saw he had posted a pit similar to the style I am curious about. I figured I'd copy the message to him here, in case anyone else may have some advice for me. Not sure where else to post it. Hi, I saw you posted a pic of an offset smoker with a vertical smoking chamber on the smoke stack. I currently have a small (really small) offset smoker. It's made from 14" pipe that is 5/8 thick. The fire box is 12" and the smoker chamber is 24". The smoke stack exits the end of the pit on the side, and is 2 1/2" in diameter and extends up ariund 18" I was recently given an old air compressor tank and am contemplating installing the air tank to the smoke stack of my offset, and make something similar to what you posted. My questions are as follows: What size smoke stack should I connect the two chambers with? Would I still be able to build my fire in the fire box and utilize both cooking areas?