Chris, you're doing awesome!

Re: your first question, obviously that's a pretty fast run, so I encourage to try and play it any way you can, and if that means maybe your'e a tick late or early on the final bend, that's okay. The more you drill it at slower tempos, the more you'll burn the sound of the run into your brain, and eventually, you'll be able to follow the pulse of it naturally!! Experienced guitar players know the sound, but it's just too fast to be able to count it in real time. Make sense?

Second question - you're absolutely correct about the 16th note triplets - another way to think of it is to play 2 sets of triplets across 1 quarter note (or 1 "beat").

Cool man, keep rocking it!

Mike