I just stumbled onto this topic. I went and took my #1s out of the safe. 2 out of 3 have a gap between the 1/4 rib and the action. One has no gap.

Do I just unbolt the 1/4 rib and go to filing on the back end. How tight are the 4 screws on the rib? What to torque them to when I reinstall the rib?