I agree if the rear view is glue to your windshield just cut the tint to fit around the base and the arm. Don't remove the mirror or it will not stick as well later.
__________________
Sponsored by: KAM Racing Sports, Falken Tires, Progress Technology, Brady's High Performance, Taggart Performance Engineering, Rotora Brakes
Autocross is: 90% driver, 5% car, & 5%
CRAZY MOJO!
Autocross Help Page