Thanks for the link.
As always, an excellent highly watchable video from Paul, 'Mr C', from the 'flight deck of the Star-ship Enterprise' somewhere in the universe, with comprehensive explanations of the effects of a leaky audio coupling cap, and on IF & RF alignment. Where does he find the time?
Given the trouble he went to in restoring the set, including re-stuffing a long shielded capacitor beneath the chassis, I was surprised that whist he left the twin section tubular can electrolytic reservoir/smoothing in place above the chassis for 'authenticity of appearance', he fitted two (unauthentic) electrolytics stuck to the chassis apron with double-sided sticky tape.
Nothing wrong with that electronically of course. He did a neat job and the new caps aren't visible anyway, but it just seemed more, rather than less work, to not have re-stuffed the can and to have retained the wiring layout as it was.