Question on FR 66s

I am privately wondering how one can cite the true pivot of the FR tonearms to an accuracy of 0.5mm, since the top of the bearing housing is a flat circular plane, IIRC. (The FR64S is not in front of me as I write this.) So, you need a REALLY good eye to find its exact center. And in fact, one has no way to be absolutely certain that the center of the circle is exactly above the center of the pivot point. Well, I will make myself satisfied by believing that it is, in any case.

Nikola, Here is a philosophical question: if you know something is second best, then you must have identified a "best" with which to compare it. Having done so, how do you know that your own best is truly best? Which means that second best might in fact be third best, or fourth, etc. Subjectivism rules.

Dear Lewm: Agree with you and I could add that first than all how can we could be absolutely sure that the hole ( arm board ) where any tonearm is mounted had the accuracy need it because we are measuring the distance: Pivot to spindle and that pivot position is critical?.

Regards and enjoy the music,
R.

Regards and enjoy the music,
R.

Dear Lew, Your philosophical questions are to difficult for me. Anyway the questions like: 'how do you know?' Should I say :'I have read this in some Magazine' to impress you?
But If you owned the Mint tractor specialy made for your FR-64 S in conjunction with the exact dimension of the spindle of the TT involved you would know when this exact
distance of 231,5 mm is 'there'. Namely when the stylus follows exactly the thin line curve 'cut' with the laser.

Regars,

Dear Thuchan, It is risky to tease someone because of his
family. This is 'not done' because nobody can choose his
family. I wish I could so we could be the real twin brothers (grin).

Regards,

Dear Nicola,
I have no wish to offend a man with "simple testes".......but by having a Mint tractor specially made for your FR-64s at 231.5mm P2S distance.......you are merely having a Baerwald geometry transcribed for the new distance.
You are not having the Dertonarm geometry with its 14.5mm Overhang and 20.5 Offset angle because Yip makes his Mint Tractor to Baerwald unless specifically ordered NOT to?
I thought you had Dertonarm's UNItractor with his Template for the FR-64s at 231.5mm?
If so........all you need to do is align to this to achieve the correct Overhang and Off-Set angle for the new geometry.
And after listening to the difference for a few days........your testes may become more cultured?
Regards