The German HIFI Magazine ''Das Ohr'' (the ear) was the only one
by which two reviewers commented on the same component.
The FR-64 S was reviewed in April 1984. BTW ''our Dertonarm''
was back then one of the (music) reviewers while his best friend
Renner established this Magazine. The arm got very positive
valuation but with two remarks. The first was the recommendation
to use Bearwald instead of Stevenson and consisted in increas
of the spindle-pivot distance with 1,5 mm (aka eff.lenght of
246mm). The other was a ''small resonace'' at ''higher mid-range''.
The ''higher mid range'' was, alas , not (more) exact specify.
So what we the FR-64 S owners need is an ''technical guy'' who
can specify the place and lenght of this ''damping foil'' which
dcbingaman mentioned.