I have a new Miroku rifle from the 80s I beleive that I am setting up as a hunting rifle; alread sent it off for a set of skinner sights. The trigger has some creep and catches and I plan on just cleaning up the two surfaces with ruby stones. I am checking to see if there are any known fixtures that I should use? Otherwise, my plan is to use sharpie to ensure the material being removed is uniform and again to ensure that the two surfaces are interacting uniformly after. I know to go slow; couple of passes at a time.
Any other advice?