Question on FR 66s

Dear Henry, First of all we live in the so called 'global village'. While Germany is much nearer to me, Mexico is not at some far-away distance. Besides we have the internet
so one hears something or other. Regarding my 'deductive'capabilities you need to (re)read my post. Those are pure legal arguments based on the property laws.
If there is no logic in those laws than I am not able to see why you should blame me for this fact? If it is a fact. However I should provide more info about my beloved aunt Natalija. Uncle Boris (her husbend) got, according to his own story, the Russian oil capacitor of 3,7 mF value from Medvedev personaly. But my aunt Natalija soldered this cap on his tweeter.
Regards,

Addendum, My aunt Natalija was the former employee by the
former 'E.I' (electronic industry) in the former Yugoslavia.

I know this Thread is about the FR-66s, but the FR-64s was introduced into the discussion and because its geometry is different to that of the FR-66s......I feel it needs some elaboration:-
Recommended for FR64s: 231.5 mm P2S, 14.5 mm overhang and 20.5° off-set angle.
This will give a very good tangential curve with very low maximum as well as very low average distortion figures in the last 2/3 of the record. For the last 66% of the groove this tangential curve outperforms Baerwald and Loefgren in any version by a very good margin.
With this geometry, the FR64s' tangential curve becomes very similar to the FR66s' original tangential curve.
This tangential curve honors the FR64s' original geometry - i.e. there is no additional breakdown-torque implied.

Halcro, I am very clueless about this and I am not quite sure what to do with the information that you give. I think I need a remedial study on this!

Came with my FR 66s arm, there is a paper protractor, is that the FR66s original tangential curve/geometry that you mentioned in the above post? I guess I need to give that a try.

Suteetat,
I know it sounds very complex and most users do not really get involved with Overhangs and Off-Set Angles.
To make it easier for you....I think you can go in any of three ways:-
1. Use the FR recommended P2S Distances for both FR-64 and 66 arms and set the geometry for Baerwald according to any accurate devices you have.
2. Use a device like the Universal Feikert Protractor to set both the P2S Distance and Overhang of each arm. This is all you need to do to have the correct geometry.
3. Purchase the UniTractor from Dertonarm which will come with the correct Templates for both arms.....and any other arms you may have or may buy in the future.