Hi CJ
Guess you're right, a while ago we used to blast Philips cathode/grid shorts and had lasting success in 20% of cases. These days such sets and possibly good tubes are at local tips in thier thousands, but no-one cares.
Would weep but - Chris (telly mending trade since late 50's) trying to get the knack of Plasma before it goes out of style, next week, hopefully.