Hard to tell from the graph but I would bet you were close enough not to make much of a difference. You will also see less of a stall cooking at 275 than at 225.
That is close to the temperature I see coming out of the stall where the internal temps tend to increase.
And for reheating it to eat, you only need to reheat so you can eat a hot meal. You've already done all the hard work. Time to enjoy it now.
You're off to a great start. One thing I've noticed on brisket, the better grade of beef, the more I look like a chef genius. More so than any other cut.
I like the looks of that black tile.
That would work. I purchased an air tight container that holds a 1lb bag and keep it in the freezer. Probably about 3 years old at this point but still works just fine.
That's why I do the reverse sear on the kk. Some other benefits as well. I like getting it medium rare all the way through and have difficulty doing that with the forward sear.