Dear Thomas,
I may be wrong, but the cartridge in the Triplanar was a MySonicLab, which isn't cheaper, but more expensive than the Dyna XV-1s(certainly true when you compare the "street" prices).
The DaVinci was used with a Dyna XX-2, less expensive than the XV-1s, but mechanically and sound-balance wise a better match than the XV-1s(IMHO).
The Tron Seven was an unknown entity even to me(though I've known Graham Tricker's excellent work for many years)and it too isn't more expensive than the Klyne or the Pass XONO which were the other partnering phonostages(all depending upon the export markets in question).
Only the Jelco arm with a Denon DL103 plus the Whest phonostage can be considered of "lesser" quality(but not bad by any means...) and cost.
Again, these were Mr. Woschniks choices, not mine.... ;-)
All the best,
Frank