So I went through a few stick on ones, but the windscreen vibrates quite a lot and they all fell off. I eventually used super glue and managed to get one to stick but the vibration meant that the image was very blurred. I could tell if someone was behind me but not what it was.
I checked to see what other owners had done and most of them used mirrors mounted on the scuttle, so I have gone that way. Nice mirror, very stable and although the view is not so good (the folded hood gets in the way) it is a great improvement.
Note in the top left corner I have fitted a GoPro camera. The first attempt at a video is here