Reverse flow portable (not trailer) smoker I have seen yet. Well at least in here anyways. 17 gallon cook chamber and 7 gallon fire box. Round and round. Hoping to be able to incorperate some form of a water chamber into it as well. I have done a lot of reading and I think I have most of the sizes and dimensions figured out. The only one I am unsure of is how much gap there should be to the reverse flow plate to the opposite end of the cook chamber? Any info on that would be of great help. First pics should be up tomorrow evening.