Really nice job! That was a lot of work and it looks like it was totally worth the effort.
I know that tending the fire, adjusting vents and stressing over temp management for 16hrs+ without falling asleep is part of the journey but it really is worth it to look into some kind of temp controller for a long cook like this. It's obviously not necessary but it does make the process less stressful. This one was recommended in my last BBQ/smoker thread. I'd never do another brisket or shoulder without it or something like it:
https://pitmasteriq.com/