Stinkpickle
Minister of Fire
That's what I was thinking. I run my smoke dragon showing 350-400F 18" up the single wall, and it has no creosote issues.Your thermometer is a magnet-mount (not probe) I assume, sticking on single-wall stovepipe, 18 inches above the base of the stove?
If so, 350F is rockin' hot! The typical place where we measure temp is on the stove top, about 2-3 inches in front of the stovepipe connector. At that location 350F is low-burn, 450F medium-burn, 550F high-burn and 600+ overfire.