How important is rear laser detection? Seems if you get shot with laser, 9 times out of 10 you are toast, especially in the Butt as your only chance seems like getting scatter from a car shot in FRONT of you. Not to say it is worthless, but I'm thinking of mounting my detector in on the dash where it won't have a clear view through the back window.
Also, the Z4 shifter doesn't depend on the detector. It can operate just fine without being interfaced to the detector right? What is the advantage of connecting it to a detector?