Bases were aligned with the Dan Hackett 'Base Align' (one of the best tools
ever ) and then bedded to the receiver. Done this way, you can remove the reinstall the bases and the bases remain in alignment. This is the Picatinny/Weaver underside. The other side is for Davidson/Kelbly/Harrell's 3/8 dovetails. The front screws were faced of a bit as the heads were a bit thick and protruded above the base.
To Dan at whatever rifle range in the Great Beyond he's at now...punching little groups in perfect conditions...thanks so much for a slick tool that I use often!

-Al