Fidelity Research FR64s Headshell dilemma


Dear FR64S users can you help me please. I have an FR64S that i bought without a headshell. I have only just got round to getting it mounted. I did pivot to spindle distance of 231.5 (the alternative distance' I also have an armboard for 230.
I tried a Sony headshell that i had - it was 2mm short of correct alignment. So I bought a new Jelco headshell it was also too short. 
CAn you tell me what headshell does work to allow other cartridges to work. I'm just using a DL103 for alignment first as I fettle the rest of my front end.

thanks
lohanimal
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.
karl_desch, I think that you are confusing ''effective length'' with
''overhang''. Effective length is the distance between the stylus 
and the pivot which is by Bearwald 231, 5 mm. On your Ortofon 
headhshell there are slots along which you can move the stylus
in both directions in order to get the right distance to the pivot.