i have a new porsche and have been told the leaded windshield will block most radar detection. I checked with valentine and they suggest to buy a window unit (30 day return). Test unit at various distances with your or someone else garage door opener. Test unit in car and out of car to see if the sensitivity detection is the same. If the V1 detects this falsie in the car as good as out of the window-then the windshield blockage may not be severe enough to go to a remote and more expensive installation. The remote or grill installation also may be be as sensitive because of the lower position then a window or visor mount.
Do you think is dumb or reasonable thing to try.