Dear @mijostyn : About your concern of neutral balance, it's ok in theory but there are other really critical tonearm design issues to really try helps to the cartridge job and yes as you and @dover as tighter the cartridge/headshell mount as the better.
I think that the main target for a tonearm designer is not only that the cartridge be hold and makes the cartridge tracking ridding in the best way but its intrinsecal relationship between these to analog items and I'm refering how to put at minimum all the vibrations developed by the cartridge/LP ridding that holds by the tonearm where those vibrations pass through as the feedback and own tonearm self develped vibrations.
That's for me is the must critical issue that affects in way different directions and in reality are what puts each one tonearm colorations in what we are listening.
Yes, bearing type and design is crucial too but we have to remember that arm/cartridge/LP/TT/plattform function not only as a transducer but live in a way imperfect audio analog world where even the " air " that surrounded can have effects in the final performance.
Put at minimum the developed vibrations for me is the name of the game.
Here, again, the SAT designer/manufacturer white papers on rigidity, vibrations and resonance:
The saphire Kuzma arm wand confirm what is my take about.
In the other side as you I'm not a fan of the tonearm unipivot designs a for the same good reasons ( several ) that you already know and in the link that Mike posted is precisely an unipivot design and we can read manufacturer statements with out any kind of measures/facts that confirm those statements.
No, I don't listen it never but:
• Torsional motion feedback control in real time
• No bearing chatter
• High torsional stability
• Non-friction magnetic anti-skating
• Ultra low resonance armwand
In real time could means or not that that kind of control happens when is happening ?
an unipivot is unstable but here the manufacturer says " high tortional stability ". What really means that under play?
ultra low ressonance arm wand. Well the best tonearms said the same.
Anyway, this unipivot looks as something to experience but any one of you can be sure that what you will sound with are only a different kind of colorations. How much different? I don't know but those differences have a intrinsecal relationship with which cartridge is mounted, the room/system resolution and certainly with the MUSIC/sound targets/priorities of the tonearm owners.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.