An alternative to using tape that I use is the Herbies Damping ring. I use it on my FR-64S with nice results. Lightweight and easily installs. I would say it takes the arm up a notch closer to the level of a FR-66S in terms of a more neutral and relaxed presentation. I guess I could add more if I wanted to experiment but one is fine.
http://herbiesaudiolab.net/jr.htm#jr
http://herbiesaudiolab.net/jr.htm#jr