I just purchased an old Nakamichi MC 1000 which is recently
(30/03/16 ) re-tipped by Expert Stylus&Certridge Co, with
Paratrace stylus in the existing beryllium cantilever. According
to the bill the re-tip includes examination of the coils and suspension
as well the removal of magnetic particles around the coil former.
The work is perfectly done but the price was 268 GBP. The boron
pipe is similar to the beryllium pipe and both are superiour to other
kinds of cantilevers ( see Fleib about cantilevers in the MM
thread).