It has been quite the year for you with this build. I have just finished reading this entire thread that I some how missed.
When it is completed you will be so happy, and it will bring you so much enjoyment. Like you I like my sports cars but I get a lot more use and enjoyment out of my HT.
Paint can kick your a-- some times... We installed a FO star ceiling and my wife went to touch up the caulked seams and caulked screw holes. She bought the paint from the same place, with some code. It did not match! We had to pull out 989 FO's from their holes in the ceiling and have the ceiling professionally spray painted. That did not work so well so they had to do it again. Then I had to reinsert all of the FO back into the holes....
Welcome to DYI... But in the end it was all worth it!
Looking forward to seeing the end results!
Best of luck,