After 31 years of driving my 850 w/o a backup camera, I've decided it's time (I can't turn my head like I used to). My other cars have one, and I love them. I would like to add a simple license-plate mount camera with a simple monitor, and I'd love to hear from anyone who has added one. There are many available, but I am concerned that the license-plate mounted camera might interfere with my ability to reach the trunk latch. Running the cable should be straightforward, and I just want a small monitor that I can set under the ash tray.