So I have a 40" masterbuilt smoker. It works good enough but like everyone else I am sort of having trouble keeping temperatures constant. I was thinking about building a plywood box around it and insulating it with some 1.5" pink foam insulation I have laying around. Anyone care to chime in if they have ever done anything similar? I mostly just am not sure what to do about the smoke vent that is in the back on top. I need to be able to get at it obviously but I want it covered so it is not subjected to wind. I also need a way for the smoke to leave the box I guess...