On my 3rd smoke now, the readings on my Mes were around 50 degrees off compared to my probe. Masterbuilt sent a new digital controler(2 days),now ONLY 30degrees off! to the low side. I give up! Sent for 732,being I only have 1 probe now,figured TJ says its good must be,because the AMZN from him is one smokin bitch,work flawless. Figure out the temp ratios and go with it,I guess. What happens if you just shut the probe wires in the door,instead of vent? Mess up seal? Thanks for all your input,this site has cut my learning curve by YEARS !!!