I'm just seasoning ny GOSM big block and decided to note the temp difference within the cabinet. The smoker had nothing in it but the hardware. All therms were tested true. With the control knob on high, The top therm read 200, middle 250, bottom 300, when the bottom therm hit 400, I set the control knob to low. When it settled down, bottom was at 250, middle 225. and top at 200. That's when I added a little hickory and mesquite. I took a pic just for reference. Hopefully this will give me a chance to smoke some items at different temps at the same time. I HOPE!