Dear chakster, Your basic premise is obviously that boron is
''better material'' for the cantilevers than ''aluminum'''. What if
your premisse is not true? The most aluminum cantilevers are
actually ''alloy''; usually with magnesium. Then the advantage
of aluminum is that the stylus can be pressure fitted . In all so
called ''exotic materials'' the stylus need to be glued. So there
is glue between stylus and cantilever. Pressure fitted styli have
more rigid connection with the cantilever. Then you own FR-
7f with aluminum cantilever which you seem to like very much.
Takeda san used aluminum for his Miyabi. Ikeda used aluminum
for the most of his cartridges. Andreoli used aluminum for his
Magic Diamond (+ other carts) while lately ''our own'' Dertonarm
used aluminum for his Archon, Aiwon and Palladian.
In my own ''modest'' collection FR-7fz, Magic Diamond, Miyabi
and Archon belong to my ''best'' next to Allaerts MC2, Benz
LP mr, Urushi Blue Sky , Ikeda 9C , Transfiguration Phoenix and
ZYX Airy 3-X.