After mounting the FR64S using the Dertonearm-recommended 231.5mm for P2S, I aligned it using the UNI. I am very happy with the FR64S, and Raul has criticized me for liking it. I guess that is a sort of badge of honor. I have mounted an Acutex LPM320STRIII induced magnet cartridge on the FR64S, albeit using a Dynavector headshell which is much lighter than any of the heavy FR headshells, but still not really "light" as headshells go. But still, this combo should not work well, because the compliance of the Acutex is given as 42!!! Nevertheless, it does work very well; it's just a pleasure to listen to this combo, mounted on my TT101. We just got home from Tokyo, where I purchased several headshells, including a Yamamoto carbon fiber job, based on Halcro's recommendation. I plan to try the Acutex on the Yam headshell, at some point.
Does anyone have any idea why the FR64S seems in this case to be exempt from the "rule" that governs matching cartridge compliance to effective mass? My hypothesis is that over the years, the compliance of my Acutex (which I purchased NOS) has gone down due to stiffening of the suspension, while the effective mass of the FR64S is less than typical due to using the lighter DV headshell.