There are a ton of threads on smoker builds using pellet hopper you can buy, as well as new electric with auber PUD controllers. So you're just using that metal box. Over at meatgistics dot waltons dot com. I was gonna link a good one but recall owner doesnt like folks linking to info outside this forum, so folks try to find all info here. I have no idea what threads are here for smoker builds, probably a lot. Should be able to find them using SEARCH.