BTW, I experimented last night with multi mode voice microtuning. I left voice 1 at zero, and detuned voices 2, 3, 4 progressively flat, and 5-8 progressively sharp. I used the mouse for very small increments and used CSassign mode. The effect was subtle, but noticeable, and it made the instrument sound more real IMO. Playing polyphonically, you don't know which voices will be assigned to which notes, so some chords happen to sound more in tune than others.
Example: Play a C major triad. Let's assume CS-80V assigns voices 1, 2, 3. Now play and hold a pedal tone and play the same C major triad again. If the pedal tone is assigned, say, voice 1, then the triad might be assigned voices 2, 3, 4. Although subtle, the tuning of the second triad differs from the first.
After fiddling with the detune knobs to set up a vintage CS-80 temperament, I unwittingly changed presets and lost all the microtuning. Maybe there could be a way to recall Detune settings independently of a preset.
Updating CS-80V to allow microtuning of the two osc on each card, as Max has suggested, would be very analog indeed.
