I have a few question regarding my new MES 30" bluetooth smoker 1) how many revisions did they have? Mine is 20072415 2) The chip pan, does that need to sit on the heating element? I thought I read that it should. 3) Anyone else report issues of thermal runaway? I can set mine at 220, and it will hold there +/- 5 but then you can check it later and it will be 310 with the heating element still on/running. Setting the temp 1 degree less will cause it fall back down and work correctly for awhile. MB has already sent me a high limit switch and that didn't effect it at all. So now I'm waiting on a new element and a controller to see if it fixes it. Thanks.