Llumar is what my Tint shop uses so I went with Llumar air 80 on the front windshield. They have done all my cars for the past 15 years with no issues. They do a lot of Teslas and the installer said this was easier than the Model X, I think because of the curvature.
Any update on your service center visit?
I have the same issue with the tonneau stopping a 6-8 inches short and then backing up a couple inches. I have done calibration a few times and it works fine 1-2 more times and then stops short again.