Solved my front sight elevation problem. Got a couple of 4 X 40 socket head screws and a brass nut. Rounded the nut, filed the factory front sight flat, and soldered the nut to the flat.Now I can screw in different lengths of screw shanks(or screws with the head on) and change front sight height at will. The threaded post is real sharp when looking through the LOL aperture. Works great with my bi-focals on.

Now I'mthinking about drilling a hole through one of the socket heads and inserting about 1/4" of fiber optic filament.