Thanks for the advice good sir. Here are the numbers I gotBig T wrote:It looks like you are off to a great start!! You pretty much nailed the round vs square FB, either will perform the same but square is much easier to work with and if you ever wanted to add a WC it would be less work. I haven't ran your numbers but there are several smoker builder calculators at the top of the page including the pit calculator. I wouldn't go over 115% max recommended size for the FB, it could make it a little harder to regulate the temperature while having a clean burning fire.