I find it easier to use a socket driver with a 5/16 bit on those cable anchor bolts. They're easier to manage, and you will never add too much torque that might strip them.
Surprised you routed the rear brake cable on the drive side of the stem.
Also think you can trim those cables quite a bit after you ride the bike and dial in the stem height.
The music you added at the end would have been nice during the whole thing.