great pictures and well worth any and all amount of 'words'...as the detail shows for many of these aftermarket sights, even going back to the Bomar, and others you NEED to "mill" a flat behind the dovetail to allow for the low profile, and is some case the rear to be adjustable, also the dovetail itself is "wider" for some makes and models of sights....thus, this is NOT just a simple drop in for a normal 1911 rear dovetail slot....thats where the Milletts, Micros and some others come , as well as needing a higher front sight blade to match