After having the wifes V1 stolen, I installed a custom 3rd brake-light - v1 install in my old dd mustang.
3rd brake light is from a 3rd gen camaro. I gutted the center brake lights to make room for the V1, added some fiberglass to make it flush with the rear roof area, painted in black, and this is what it looks like from the back.
You cannot tell it's not just a regular 3rd brake light, and the brake lights actually work..... it surprisingly good detection even on my ceiling in the back.
I initially had a small window for the front.... but later had to dremel out a large window for better reception.
I've got the Remote Display on the Steering column.
The best part for me is I've always got protection wired in, and no taking unit up/down every time I go somewhere.