Hello Lewm,
I think I got a little bit of a taste of what the UNIverse can do, since I own the Airy 3X SB. (Low Output)
It was our highly regarded inmate Doug Deacon who steered me to the Airy 3 through Sorasound. A brand new Benz Ruby 3 I had prior, never went back on my Table after experiencing the ZYX Cartridge. I was lucky, in that I had found very suitable pleasing results with a more humbly priced Arm, the AQ PT-9.
Little doubt that a better Arm than the AQ would bring even more refinement from these fine Cartridges, but I am very happy at present.
It was I who helped prod John Hoffman into suggesting, and him acquiring the ZYX 4D from Sorasound that currently resides on his Galibier Table with Riggle Woody Arm.
John was looking for a giant killer, and I think he is more than satisfied with what the ZYX 4D does in his system.
My concerns were not so much what the 4D could do, any lack of quality of the Riggle Arm to perform, but rather if the 4D would be a compatible compliance match for the Riggle Tonearm. This Arm-Cartridge combination has apparently worked extremely well John claims.
Mark