Sweet buttery babies, removing the ribbon cables through the hinge is the most stressful thing I've done all week. You need to add more detailed pictures of this, the hardest step.
The plastic bezel damaged in step 6: would this part generally come as part of the rear housing or the front housing? If I need to order replacement parts.
Looks like the front housing...
I have what looks like a small circle of rubber, maybe thermal paste, between my Snapdragon and the case that isn't pictured in the teardown.
And I think the T1/T3 comment is spot on. I used a T3 to remove all the main screws, but don't have anything small enough to take out the monitor, at the moment.