I've have done one but still need to do the second
I did get mine from
http://www.esslinger.com/mineral-gla...h-crystal.aspx
I think I used some black RTV after I cleaned the port really well, clean and dry with no brake fluid residue.
Watch Crystal Flat Round Standard Mineral Glass Crystal, 1 mm Thick
MM Size: 16.1mm
The original sight was so fogged and crazed, and I touched it, and it disintegrated.
the one that still needs to be done:
http://i235.photobucket.com/albums/e.../xDSCF0100.jpg
the one I have done:
http://i235.photobucket.com/albums/e.../xDSCF0101.jpg
Steve