I custom built this Vertical smoker and I used a harrow plate from a tractor as a defusser plate. Pappy also got the shelf for me from an old grill a guy we work with was throughing away. We also salvaged the wheels from a local scrap yard. I am getting ready to start a UDS build and I am throughing around the idea of using the bottom for a lid. I bought an old weber and it has 3 dampers on the bottom and I think it would be great as a lid.