Fidelity Research FR64s Headshell dilemma

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

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.

Hi all.  Love this forum.  Maybe my earlier post used some incorrect terms. Let me clarify best if can and ask for help about setup (appreciate the vocabulary lesson). I have a TT where the arm board can be adjusted to alter pivot to spindle length.  I have the SmarTractor (smarter than me evidently) where you can measure P2S.  When I set the P2S at 231.5, and proceed to set the cartridge in the head shell for overhang adjustment for Baerwald alignment, I am unable to to move the cartridge forward enough in the head shell.  This is what I thought the OP was also having problems with.  So two questions, am I setting the P2S distance wrong with my SmarTractor?  I don’t think so as I followed instructions. Second, is the 231.5 P2S only for Stevenson alignment? This would confuse as I thought the different alignments were agnostic to P2S as long as this is set correctly for the individual tonearm.

help?

Thanks all.  I bet the Arche head shell would work!  I was re-reading the SmartTractor instructions and the two example tonearms are the FR66S and the FR64S.  The man likes his Ikedas.

I think the key here from Raul is that the P2S mounting distance is specific to the tonearm regardless of alignment choice.  This is what I thought all along.  
So when a knowledgeable person with experience with the FR-64s suggests 231.5 is correct and not 230.0 for P2S, what is this possibly based on?  Actually measuring the EL of his FR-64S arm?  I’m sure someone here remembers what the 231.5 suggestion was actually based upon.  

Not sure if this is directed at me @chakster but I am trying to figure this out too.  Why is the 231.5 recommended by some when the manufacturer recommends 230?