Hi there, it is nice to see here someone from foreign country! Welcome here!
Just few hints:
975e is definitely newer hardware than 966R. The sensitivity at 34,3GHz is much better with 975e. Can switch all bands on and off again and extended horn will bring of course much better sensitivity than without the horn. I have tested this like two years ago with Valentine One and the results were great. My antena was about 12cm long??? do not remember but it is somewhere here on the phorum. There was like 100% gain in the distance of the detection so great diference... I did not notice any higher false allerts count and if I remember right there was incredibely lower falsing with this added extension.
Yesterday I got the email where Target Automotive offered me his own solution of aditional horn. The only problem is that the horn increase the size of the antenna a lot and after that it is quite difficult to fit this solution into different types of cars...
Here is the picture: As you can see there is also ability tomount the detector facing down and spare some place...
