I was just given a 120 gallon propane tank from the local propane dealer that I can use to make my first smoker. I will be working with the students in the metal shop at the high school i work at to fabricate this. I am looking for design ideas as I am certainly not a metal worker, and the students I am working with are good for high school students. I have read the forums and know to add dawn soap and water to the tank a few times before anyone cuts into it. Do you have any suggestions as to design? Thanks!!