I looked to see if I had another, better, picture of the detail you want, but this is the only one. It doesn't show it real good. Larry's pictures are great. My light fairing just kind of goes straight up without overlapping the top, like his. The flox mixture fills in any gap. Also, I stole Larry's idea to use flush pop rivets for a cleaner look (plans deviation

).

You can shape the flox mixture with a flat tool if you make it about the consistancy of peanut butter.
Tony