I did a butt on friday, about an hour in i was snooping and found all my thermometers(an oven thermometer, an instant read I had, and the one bolted to the door of the smoker) where reading different. So I went to the restaurant supply store and bought a quality oven thermo. Anyway everything came out fine, but I'm open to suggestions about how to keep my thermometer clean from the smoke.
Bytheway: The thermometer that was most accurate was the cheap one the smoker came with bolted to the door.
I think Pringles initial intention was to make tennis balls, but on the day the rubber was supposed to arrive a big truck full of potatoes showed up, but Pringles is a laid back company, they said "What the hell, cut 'em up."