Fidelity Research FR64s Headshell dilemma

Referential opacity. How does one know that ''Ikeda headshells'' 
are Ikeda's? How does one know that retip by Van den Hul is
done by Van den Hul? As we should know no cart producer
produce his own cantilever/stylus combo. Why should this be
the case with other parts? My opinion is that all FR or Ikeda
headshells are worthless. This also apply for FR phono cables.
But there is this illusion about ''original parts''. Americans seems
to attribute some special ''quality '' to the word ''original''.
Old cars with original parts are sold for millions dollars.
But then one also talks about ''improved versions''. How is
any improvement  possible  without  changing any original
part?  What about ''Japanese wonder''  Deed they not improved 
Western products by improving their parts? 

Addition, Typical example of referential opacity is Orsonic.
There are 3 versions : AV-1 ; AV 11 and AV 101. Those are 3
different ''animals'' to which is referred with the same name.
So those who don't like ''Orsonic'' probably mean the first light
version AV-1 . Its rigidity is obvious problem. But AV 101 weight
14.5 g and looks very sturdy (aka very rigid). 
The other way round is the case with Jelco HS-25 . This one is
offered under different names but with  the same bearer . Sumiko
HS- 12 is identical with HS-25 and some other. All with different
prices. So when one has not idea to which object an name refers
one can't know what he is talking  about.  I have seen Sumiko
for $30 and Jelco for $80. 

I have an Fr-64S.  I have a couple different alignment protractors but last year actually started using one that measures P2S distance (SmarTractor).  So I set the P2S to 231.5 and like the OP, was unable to get my cartridge forward enough in the head shell to set the overhang correctly.  I was using a Ortofon rosewood head shell.  Had to set it at 230.0 to achieve the overhang.  This strikes me as strange because using an arc protractor, I was able to use a Baerwald alignment. One of the two must be incorrect?  Probably the arc.

Oh, and the cart I was using was the Koetsu RSP.