The thing at the end of the tonearm that Balthus is futzing with is not meant to be turned and I wouldn't be surprised if his futzing hasn't added to his problem.
This comment is wrong.
The adjustment of tracking force requires the knob on the end of the arm to be rotated ( whilst you hold the arm tube ).
As you look at the arm from the rear, turning it clockwise reduces tracking weight, turning it anticlockwise increases tracking weight.
From the manual
Roter Pfeil (Verschiebung Richtung Tonarmende)
= weniger Auflagekraft ->
Drehknopf im Uhrzeigersinn drehen (rechts)
Grüner Pfeil (Verschiebung Richtung
Tonarmanfang) =
mehr Auflagekraft ->
Drehknopf gegen den Uhrzeigersinn drehen (links)
Unfortunately the Germans can't read German.
Drehknopf - in English is rotary knob, in their English translation they call it the counterweight, which is not correct. you rotate the knob on the end of the arm, not the counterweight. No screws involved.