As J. Carr explained the advantage of aluminum is that the stylus
can be pressure fitted in. By all other materials the stylus must be
glued in. The glue between the stylus and cantilever means lesser
rigidity of the combination. From this follows that ''one piece''
diamond /stylus combo like by Sony 88 D is superior to glued in
styli. To correct bdp 24 there is a whole series Ikeda's 9 with
cantileverless construction. Those are ''better Decca's'' (grin).
I just got the REX the latest Ikeda's version.