As I mentioned on page 3, my sunshade was out of the U-channel on the passenger side and I was going to have the dealer fix it. I didn't want to risk breaking the plastic clip.
However, I was able to easily fix it myself by unscrewing the back four of five torx screws holding the sunshade unit to the roof, pulling the whole unit down slightly, then flexing the long metal glide enough to insert it back into the plastic clip. This sounds confusing but is obvious when you look at how the screen works. I didn't remove all five torx screws as I didn't want the whole thing to come apart, which apparently is a real pain to put back together.
Stan