Now, let's talk about the cook. One thing that I have learned is that your grid level temp is almost always going to be 25 degrees or so lower than your dome temp during a low n slow indirect cook. Thus, if I had been measuring the temp just around the meat, I probably would have measured about 200 degrees. Now, I was shooting for an internal doneness temp of about 195. It would have been very difficult to achieve 195 internal with a 200 degree ambient temp - or, that is, it would have taken a very long time. And, well, that's what I discovered . . .
At hour 20, my fire died. Now, this had nothing to do with the Guru, as it maintained that 225 dome temp rock solid through the night and up to the point where the fire just simply ran out of fuel. When I finally broke down and opened the Egg to ascertain the situation, I found that probably 95% of my lump was gone. I should also note here that I had NOT filled my firebox all the way up to the firering as I should have, and I'm not sure why I didn't except that I was in a hurry the night before getting everything going.
Anyway, I threw some fresh lump in the firebox (didn't do any cleanout), lit the fresh lump with my Mapp torch, replaced everything back in the Egg as I had it before, and reset the Guru, this time for 250 dome, which would equate to about 225 cooking level. Incidentally, my meat temp was at about 172 at this point, and in the midst of taking everything out and rebuilding my fire, I only lost 1 degree of internal temp.
Witb the Guru piping along and my dome temp now at 250, the butt reached 195 three hours later. So, I took the butt out and put it in a cooler to rest for one hour (if I hadn't been so hungry, I would have let it sit for at least three hours). After this rest in the cooler, I pulled the pork, and man did it look good. I didn't take a lot of pics b/c I was so hungry, but here's a pic of the first sandwich I made before it was completely devoured: