Started out about 4 years ago wanting to have my own cooker. My Aunt and Uncle have catered many cooks on their custom built smoker that my uncle and friends built from an old boiler, so after 3 years of me have most of what it was going to take to build it, he offered to do it for me. We went over plans and calculators, and he said, build the damn thing the way you want to and learn to cook on it. So I did. I don’t have measurements as far as the firebox size etc., but am determined it will turn out a great product in the end. Started with a 500 and a 250 gl propane tank, ( I work for an Ag Co., so got a good deal on failed tanks).