I cut a notch in my WSM yearís ago but I rarely use it anymore. I used to use probes and monitor the cook but now I just fire it up, put on the food, and a little while later go probe around to see if itís tender. In fact the picture on the right in Chrisí article on the subject it my cooker http://virtualweberbullet.com/cuttin...eter-slot.html. I donít think I even have batteries in the Mav anymore. Iíve reasoned it really doesnít matter what temp it is, if it isnít probe tender it isnít done. Ribs take about 4 hrs, briskets about 5 and butts all day.