I have been using an STI in my Semi and have been experimenting with mounting locations. Sometimes on the dash with velcro and a hat over it for cover and sometimes mounted behind the passenger seat looking out the front winshield at about mid winshield. In this position it is mounted vertically and stays in the shade, running cooler and making it hard to notice by LEO and weigh stations. I have noticed no noticeable difference in the sensativity mounted vertically, nor any loss of performance..
Im no goo roo of detector know how and learned a new term OFF AXIS.
How will being mounted VERTICALLY effect performance of off axis alerts? I have not noticed any differance as of yet, but im not sure I would notice anyway.