If 9 inches isn’t enough…
I’m just saying.
Seriously, although the FR66S commands much bigger bucks than the FR64S, from a collector point of view, I’m not sure it’s a good idea to convert one to the other, especially given the probable high cost of the conversion. It’s really a matter of personal choice and having a cartridge that’s particularly suited to the even higher effective mass of the 12 incher. I do know that some of our European friends revere the 66.