I'm not in the hidden category, but I run a Valentine 1 on a Techmount and it does the trick very nicely. Bikes are much harder to pick up to begin with so unless you're dealing with instant on, and you're the only one out there, you've got a big advantage. Laser, is tough with anything, but on a bike, you have to get pretty close before they'll get you.
While my ride is a little different with not having the fairing, the reality is, I would probably will stick with the bar or windshield mounted V1 when I finally move up to a SEUC. Having the front and rear capability and the stellar performance of the V1 really offsets the desire to have something hidden which will reduce the signal, especially to the rear. No matter how fast I'm going, I can get down to safe range with plenty of time to spare.
On the highways out here, cops very frequently haul ass and sneak up from behind which can be tough to pick up with our tiny vibrating mirrors. The rear protection and the arrows is an absolute godsend and has saved my behind many times!
I think across the board the fact is, with or without devices, you really have to learn how to look inconspicuous, leverage blockers, and watch and blend in with the flow of traffic to reduce your odds of getting nailed. And, if you're alone on the road, no matter what you're using, stay below 5 to 10 over, depending on the area. If there's no one in front of you, you're a sitting duck, and no amount of counter-measure will help much.