After two weeks with my egg I started my first pork butt last night. After two hours it seemed stabilized at 240 and I went to bed. Slept really bad-got up 4 1/2 hrs later and went out to check on the temp of the egg, it was down to 175, opened it up a little and got back about 240-let it idle that way until the internal temp was 180, then opened it up a little more so the dome temp was near 300, and took the butt off when the internal reached 200-then wrapped it and let it rest an hour. A little sauce, a big fork for pulling, and cheap buns. My wife declared it wonderful and moist. Needless to say after 20 1/2 hrs on the egg I was a little nervous. Now I understand why many people do more than one butt at a time-it's gone--but there will be a next time.
And thank you Elder Ward for your info in the Recipe section of this forum.