I recently purchased a Williams 5-D JEMS peep sight. When it arrived there was very little information as to how to install it and how to adjust it for sighting in. I searched several sites for the information I was looking for with no luck. I requested here on MO for help, and BFPGW supplied all my answers very articulately. With out his help I would have had to play with the sight to install it and guess how to adjust it when sighting it in. This might help other's in the future if placed here.