Dear @rich121 : Looks that you don't care but even that I have to tell you that the FR 64/66 are undamped dynamic balance tonearms and througth that and to set the VTF that tonearm use a spring mechanism that per se rings as a " bell " developing additional distortions. Many audiophiles love those heavy overall tonearm/cartridge developed distortions not me that always I'm trying to achieve at minimum every kinf of distortions in my room/system to achieve the best quality performance I can..
In the other side and due that you will have a plinth for 2-3 tonearms I already gave you an excellent alternative through those Technics EPA 100 and MK2 tonearms.
Now I want toshare with you another great additional alternative with one of the best pivot tonearm ever amde it by Micro Seiki with its models MAX 282 and Max 237 / same vut different arm wand length.).
This MS comes with a unique and wonderful tonearm bearing mechanism due that's is giroscopic bearing, comes with slected damping and it's a dynamic balance design with no spring to set the VTF but a mechanism that just does not adds distortions and you can own or choose its 3 arm wands ofered:a J shaped headshell removable and 2 straight arm wands ( one for high compliance and the other forlower compliance a heavy cartridges. A beauty for say the least because its quality build precicion is second to none. I owned too as the FR too.
https://hifi-wiki.com/index.php/Micro_Seiki_MAX-282
R.

