I ever started a thread about ''irreparable cartridges''. However
nobody was interested. Chakster ''sealed body'' is the reason why
such carts are not reparable. My first was Sony XL 88D
which not only was ''sealed plastic body'' but the body was also
''potted'' with dampening material. ''Sealed'' means ''glued together''.
For any repair on the generator the body need to be cut to get
access to the inside. My friend Axel was willing to do this for me
but by ''cleaning'' the inside he broke the coil wire . The ''old
master'' Mori san who designed the XL series stated that his XL
series carts are irreparable.
The ''sealed body'' by ZYX is made from acrylic. But to get access
to its inside one need to cut or drill holes in the body in order
to reach those screws with which tension wire is centered and
connects ''movable parts'' (cantilever/stylus + coils) with
the generator. According to Axel the suspension is the weak
part of the ZYX cartridges. But this means that to change the
suspension the retipper would need to drill or cut the body.
So, also considering the price of the ZYX kinds buying them
is a risky business in, say,'' the long run''.