I’ve seen the YT clip of the guy tightening up the older version. I have the newer version which does not have the convenient exposed cog/screwdriver slot to adjust. My 1953 model has the one piece FPS mech cover . When I remove it there’s a whole bunch of parts visible, none of which look like anything I can “tighten “. I have the service manual, which is only vaguely understandable. Anyone have any tips or experience they’d like to share?

Sorted. In fact, had it all apart for cleaning and careful lubing of gears and such.