I am thinking about setting up like some of you with the redline on the front window and the V1 on the back window. I just have a few questions. How much interference with the Redline still exists and how does the v1 respond for being on the back window? The other rhing I am trying to figure out is how to mount my V1 in the back. If I use the visor clip on the headliner it causes the v1 to point to the ceiling. Anyone try to just use the suction cups? Im looking forward to being able to use the spec mode of the redline combined with the arrows of the V1 as well as still having a bar graph to judge distance as that is what I prefer.