We bought one Road Angel and 2 fixed IR camera detectors heads between the family, the idea being that the unit can be swapped between cars whilst the detectors are permanently installed discretely behind the radiator grilles.
Good plan?
Well, spent a good part of this morning taking out the radiator and facia out of her car only to find that Sonny has buggered off to Portsmouth for the weekend taking the spare detector with him in the glove box. Guess I’ll just spend the afternoon putting it back tohether again. 
Still it will be easier next weekend, I’ll know what I’m doing. 