My parents gave me a pretty big propane smoker for Christmas this year. This thing is way more then what I currently need but I use it anyway. It has 4 or 5 racks and resembles this smoker. That might actually be just like mine. Mine has two adjustable air vents near the bottom though. Anyway, I am big fan of Charcoal. Would it be acceptable and/or practical if I made a metal tray of some sort to put in the bottom of this beast and use charcoal (of course, removing the propane burner)? I was also thinking about possibly tightly covering the burner with tin foil and putting a pan over it, so it could be a duel fuel smoker? Input? Thanks!