In my old Model 3, on long trips I let the kids watch a movie on a cheap tablet that was mounted to the roof glass with a Sosche suction cup mount. It worked and stuck flawlessly for two years. However, I resorted to mounting the suction cup on the front-most portion of the roof, slightly bending my Amazon purchased sunshade out of the way so that I could mount the suction cup.
Fast forward to my replacement 7-seater model Y. Again I purchased a roof sunshade from Amazon and it had a bit of sag, as expected from reading forums. I took advantage of the design of the Sosche suction cup mount by cutting a small slit (3/4 inch) in the center of the vehicle. I then squeezed and mushed the suction cup so that it fit through the small hole and the rigid plastic base pulled up the sunshade nearly flush with the glass roof. No sag. Done!
Bonus: The new version of the magnetic Sosche mount has a sticky suction cup that has stronger adhesion to the glass than my older Sosche mount.
Sunshade:
Tesla Model Y Roof Sunshade Panoramic Sunroof Sunshade Tesla Model Y Accessories 2020 2021
Tablet Mount:
SCOSCHE MAGTHD2 MagicMount XL Universal Magnetic Suction Cup Mount Holder for Mobile Devices, Black
Fast forward to my replacement 7-seater model Y. Again I purchased a roof sunshade from Amazon and it had a bit of sag, as expected from reading forums. I took advantage of the design of the Sosche suction cup mount by cutting a small slit (3/4 inch) in the center of the vehicle. I then squeezed and mushed the suction cup so that it fit through the small hole and the rigid plastic base pulled up the sunshade nearly flush with the glass roof. No sag. Done!
Bonus: The new version of the magnetic Sosche mount has a sticky suction cup that has stronger adhesion to the glass than my older Sosche mount.
Sunshade:
Tesla Model Y Roof Sunshade Panoramic Sunroof Sunshade Tesla Model Y Accessories 2020 2021
Tablet Mount:
SCOSCHE MAGTHD2 MagicMount XL Universal Magnetic Suction Cup Mount Holder for Mobile Devices, Black