I am doing my first run on my UDS right now. After first lighting the charcoal and waiting for the temp to come up, I was surprised that there was about 75 degrees difference between the thermometer in the center and the digital one over to the side. The two came closer together as the drum warmed up and began to stabilize but there was still about 50 degrees difference. After I put a 10 Lb. butt in the center, it has been chugging along with the center probe gauge reading 230 and the digital one off to the side reading 200. I have a Kingsford dome lid on mine and the outlet vent is almost in the center. I think the meat in the center helps distribute the temp since the heat is not just going straight up. Man this drum is amazing!! It has been burning steadily since 1:00 AM and it is now about 8:00. I love it!!
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