Well done !
For future reference there are 2 major varactor tuner set-ups
in Zenith CC2 sets.
Early sets used separate UHF & VHF tuners ( 175- ### ) a tuner
control board ( 9-###) & a selector assy ( S-##### ).
Later sets used a big combo U/V tuner ( 175-#### ) & the
selector assy.
If you have more drift resolder the connectors on the big tuner
or if it has a control board on that. If that dont do it pull the tuner & look
for cold joints especially at the shield points.
BTW Selectors were known to drift but I dont know why. We just
swapped out the unit, it was faster & cheaper than troubleshooting
it.
73 Zeno
LFOD !