I got the HD in 1971. As I recall I just added some locktite to the dovetail and the screw, adjusted it several times right after, and called it a day. It hasn't loosen up since then, even after a bunch of years being used in competition.

The rest of the story is that my old Buddy asked me how I could shoot so good with it. When I told him it was a loose screw he never talked about it again.