I dial it to the lowest point where there's no buzz and then lower it slightly further so I can intentionally create "clank" out of it. The action on my SG bass is currently 1 mm at bass side, 0.5 mm on the treble side. If I pluck really hard at the neck or dig in hard with a pick, it clanks as I intend. Doesn't buzz if plucked/picked regular-softly or typewritten. But when I think about it, typewriting is basically playing upon the clank.