I know enough about jammers and I know that this set-up is perfect for that car. And the performance test this guy has done of his ride show this...
The problem lies in people that do a similar set-up with LED based jammers. Also the biggest reason this set-up works like that is simply because the detection ability of the Laser Interceptor is bar none the best. Also using an Laser Diode for jamming works much more efficiently than 8-10 LEDs found in other jammers heads.
I was worried about this set-up but I have seen some far more worrying set-ups with this particular jammer BUT the creator of the jammer says they are good installs and I trust his opinion cause I know he wouldn't want anyone hindering the performance of his jammer.
Jamming isn't the hard part really the hard part is detection and coming up with something that will detector only true laser hits. Ivan from Croatia of Laser Interceptor has nailed detection according to the results in these too videos
http://www.youtube.com/watch?v=1JiQwucwuYo
http://www.youtube.com/watch?v=c5LirljHSPc
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Personally I wouldn't mount my jammer heads in the same location but thats just me. Sorry that if might seem weird of the pictures i showed but the location works. I have been around jammers enough to know proper mounting I did the install of all the jammers at the Guys Of Lidar event where the prototype version was tested.
Here is a video I made for the average people to see where I clearly aggree with the 100% unobstruction