Not confused on the front hooks--it would be great to have the front base out after all, and be able to "peen" or otherwise force the final tightness from below (but a little intimidating to unsolder it, as it is not just dovetailed in by a tight fit.) Thanks for taking the time!
As to the rear mount, am I visualing you removing only the narrow "groove" of metal which contacts each claw and not milling flat the center portion of the underside? Understand not filing the lateral adjustment! Wouldn't dream of it. Had one Sauer with a worm screw adjustment (no opposing screws) which turned much too easily for my tastes. Wished I knew how to tighten it up at the time. The adjustment was always moving mysteriously at the worst possible time. Once again, thanks for the input, Mike...Steve