Well I've put my STI driver in the dash of my vehicle. It is basically just below the dash in the speedometer bubble but slightly above the main dash board.
I think I've noticed a slight decrease in range but I've only been able to test this on Kband Automatic Doors. Is this going to seriously affect radar range? I can live with a slight loss in range for the added privacy.
BTW I've got blinders so laser is not a concern.