So I am building my first smoker and I am attempting it with a 500 gallon propane tank. Thanks to a lot of research, especially here at SMF, I think I have it figured out with the proper measurements. My brother in law is wrapping up a two year welding program and is helping me with all the welds. He is doing a great job so far! I am posting some initial photos and will add more as it continues it's progress to a final product!