Well today is my first brisket try and it has been a struggle so far. One probe says 150 and the other says 170 degrees. It seems that one part of the flat is hotter than the other???? When I move the probes by eachother they read about the same. But the problem I have is they read about 30 degrees different when they are not by eachother. I just calibrated the one to double check it was on and it was. I think I am going to calibrate the other one again to make sure it is still on. I am pretty sure they will be on as I have been using them for lots of smokes. Can a brisket be that much different depending on where you probe it?