Anyone have any experience with this? I noticed some pretty temp big swings (+/- 20F) using Wicked Good lump charcoal. This was after the temp had stabilized at my selected target of 225F, so I'm not talking about the initial temp "bracketing" that occurs just after the Stoker is turned on. In fact, at one time the fire pretty much went out and the smoker temp went down to 175F before I caught it (needless to say that brisket wasn't one of my better efforts, but that's what sauce is for I guess). There was plenty of unburned charcoal in the grate, so no lack of fuel, and the fan was running continuously in an effort to raise the temp.