I like the electrochromic mirror but I wouldn't mind if it darkened a bit more in response to headlights in the mirror at night. Thus, I was interested in this page from John's site where he says "Modified the Electrochromic-Mirror so it would get darker at night" as the caption to a picture that appears to show the back of the mirror with a piece of blue paper (?) taped onto it. Can John or someone else fill us in on what he has done and how well it works?