I've checked some voltages with a DMM and they are much the same as they were before:-
H.T. voltage 196V (should be 205V)
Boost voltage (take from C109) is a disappointing 415V (should be 480V)
C.R.T. heater voltage is also disappointing at 11V (should be 12.5V)
The twitchy picture seems to be worse today and I think I can faintly hear some sort of a static/fizzing noise coming from the right hand side of the chassis (looking from the back) unfortunately I can't pinpoint where it's coming from... I fear doom is around the corner
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Regards
David