Questions #1-2
Day #1
There are no printed instructions, but don't worry. Although the video is choppy, you can still follow along. Just pause it several times if needed. Start by removing the dash trim and then move on to the two front door panels and trim
Day #2
Removing the front seat back covers can be a bit tricky. You must lift the head restraints to gain back seat cover access, but it's unnecessary. Carefully insert the optical tube assembly between the seat and the back cover, and then feed the Y cable underneath the seats to make the final connection on each side.
Day #3
Remove the FWD panels and prepare the trim, you'll need spare replacement door fasteners on hand. Expect to break a few during the door removal process. I recommend that you purchase the following: a Dremel tool, a Tesla door fastener kit with trim removal tools (available on Amazon), JB Weld plastic bond or Gorilla superglue (also on Amazon), C-clamps for trim bonding instead of tape (you can find these on Amazon too), and a flat head screwdriver.
Good luck with your ambient light project and enjoy your MX
