Here's a review of my cook.
I trimmed some fat but I really liked buying the untrimmed second cut, the outer fat protects the meat from drying out. The beef was still a little frozen when I started.
I was cooking at 225-240 for most of the first part. it stalled at around 140's and stayed there till I covered it and bumped up the temp (5 hours in). I think this was my mistake, as opposed to covering it sooner.
After I covered it i bumped up the temp to 270 and it started climbing. At about 7 hours in I got nervous because I was only planning to cook for 6.5 hours as I had 6.5 lbs. and I have a long history of overcooking these. So at 7 hours it was reading 180 and it passed a tender test (fork twist) and I conceded and lowered the temp to 150 to begin resting hoping it would climb another 10 degrees- to 190 which it didn't. 20 min later I sliced an amazing piece of brisket
I know 210 is where I want to be but even when I took it off some parts were dry and I wonder how to get it to temp and not to dry out while cooking for that long. Though all in all dryness was not my problem, the fats didnt break down completely and some parts where only chewable.
Other parts were just below perfect in respects to tenderness. The flavor all around was amazing and the bark was delicious (salt and pepper)