I used a 1500 watt 120v burner and am using a PID set up from Auber. I insulated the fridge pretty well. Going through autotune, it passed my target temp of 225 and stopped output but the temp kept climbing. All the way up to just under 350 degrees even with intake and exhaust wide open. The outside still felt coot to the touch though, which is a plus. My next step was to set At to 0 and set Hy to 2. Left door open untill unit cooled then shut the door and started her back up. Same problem. My next step will be to use a 650watt 120v element instead and hope that the temp fluxuation will be better with a much smaller element considering I onviously insulated it well enough. Any thoughts? I dont want to install a fan because it would need to be at element level and that may ignite the woodchips. Any thoughts or suggestions or am I on the right track going with a smaller element that SHOULD cool down faster. The 1st element I mentioned is a coil burner incased in cast iron so i definitely know the cast iron is one of the problems with the temp climb.