Kuzma STOGI REF 313 VTA 91119 - Manual (Page 6)

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4. Adjustment of tracking force
Balance the tonearm with the tracking scale, which must be at record height. Rotate the
counterweight towards the tube to increase tracking force. Rotating the counterweight for
one red dot changes tracking force for approximately 0.15 g.
Check that the cueing device is at the correct height (see paragraph 9)!
5. Adjustment of tangential geometry
Put a record on the platter and adjust VTA in such a way, that the central axis of the tube will
be parallel to the record. This is only a starting point for VTA.
Using the protractor, adjust geometry at two null points. Rough guidance is by the edges of
the cartridge body, but accurate adjustment is by observing whether the cantilever and lines
are parallel at the two null (zero) points.
See appendix 1.
6. Adjustment of VTA
It is extremely easy to set up VTA on this tonearm. Just unlock the lever at the back and
rotate the VTA knob. VTA knob rotation CW- VTA down (Fig.1)
VTA adjustment between any two lines is 0.1 mm (the whole rotation is then 0.8 mm) which
allows for very fine repeatable adjustment. The rigidity of the assembly is such that even in
the unlocked position you will not feel slack. Move the tonearm VTA to the desired height.
Simply lock the lever back with gentle force. Observe the 1 mm scale at the left hand side of
tonearm tower (Fig.5). If you run out of range (10 mm), then you must reposition the tonearm
height in the armbase. However take into account what is the optimal VTA by listening.
Once you find out the correct VTA, rotate outer ring of the VTA main knob and position it
into null position. This is now your starting point for very fine tuning.
Fig. 5 VTA tower side-rough scale