Looking great.
I also did the reverse sear last night with bone-in strip steaks. Used 25 coals banked with some apple wood.
Flipped at 80 as you did, and at 90 I lit am almost full chimney.
At 115 I pulled the steaks and poured in the hot chimney.
Seared the strips without bothering with the cold grate thing.
They came out perfect, just like yours.
Love the slow n sear and the drip n griddle.