said, it should fare at least OK/fair -to- well/good, depending on the specifics of the encounter.
Why are my statements so guarded?
Although direct testing seems to suggest that performance would be unaffected:viewtopic.php?f=2&t=315&hilit=vertical
(this is the thread that go.mouse
cited, I believe)
^ it nevertheless serves one well to remember that there are true-technical concerns:viewtopic.php?f=2&t=256&hilit=verticalhttp://www.radardetector.net/forums/las ... cally.html
At first glance, it would seem that the real-world testing result is directly contradictory to either the observed beam "brightness" and/or the theoretical (based on the output specs of the laser diode).
But if you thought about it a little more, that's not necessarily the case.
Look at the testing - while the course is certainly rigorous, it's not "worst case." Yes, it's rigorous in the sense that engagements are brought all the way to "point blank." Yes, it's rigorous in that there's experienced shooters on the other side, trying to elicit PT. But it doesn't really take into account truly extreme-angle engagements, "ambush" engagements, or the inexplicable and unpredictable "luck factor."
So, what does this mean?
If I were in your shoes, I'd ask myself the honest question of whether or not your local enforcement habits come into the category of "worst case."
If not, then yes, I do think that a vertical setup will fare well enough that you should not have any concerns.
But if you have doubts, then it'll be time to tackle the question in another way: i.e. is concealment and/or aesthetics more important to you than sufficient protection - is the risk-ratio viable, for you, personally.
In terms of mounting, 3M Automotive Trim/Mo(u)lding tape is quite strong, and as long as the surfaces are prepared properly, you should not have any problems, particularly if the surfaces are close enough together as to offer some degree of physical reinforcement (i.e. the "slats" are of the right size that they literally "squeeze" the mounted head/tape combo).
Just remember to check leveling routinely.
Even with a true hard-mount, I still advocate routine head leveling/aiming checks - this is something that was demonstrated to be of critical concern just a few years ago. Just as you would check your tire pressures and vital fluids regularly, you should also incorporate this checkup into your routine.