One owner roundies are still out there....scored a Zenith

[old_coot88]

The very first thing i would do upon acquiring a Zenith roundie is check the condition of the plastic (nylon?) H.efficiency coil form. Especially on a high-hours set. If that form lets go, everything else is moot till the coil's replaced.
The three adjustment coils on the convergence panel use the same kind of forms. The middle one looks like it has already let go (of course that doesn't render the set unusable.)