SS,
If I am understanding you correctly, the under surface of the dovetail below where you marked your arrows is not contacting your sight even with your shim which is between the horizontal surface and your sight.

Wouldn't a few layers of paint on the bottom of the sight provide enough upward pressure to engage those surfaces?

-OMotS


"If memory serves fails me..."
Quote: ( unnamed) "been prtty deep in the cooler todaay "

Television and radio are most effective when people question little and think even less.