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You've done two things that seem like EXTREMELY bad ideas to me.
First you tweaked the alignment without a TV alignment generator. It is nearly impossible to get TV RF and IF alignment right by eye alone, and nobody should EVER mess with it unless they have a good TV alignment generator, and oscilloscope, the factory or Sam's alignment instructions for the set to be aligned, and plastic alignment screw and hex drivers(if you use metal ones once you dial in an adjustment, the moment you remove the tool from the slug it will loose the adjustment you made, plus metal ones tend to crack apart and destroy adjustable cores).
Second it sounds like instead of cleaning the HV you just applied hot glue. This is bad on two fronts. Arcing can often be caused by dust and dirt building up and becoming a conductive coating...If that has happened(and you can't usually tell from looking) the glue likely won't do a damn thing to remove the conductive path formed by the dirt causing arcing. Lastly hot glue in the HV cup or almost anywhere on a chassis is a bad idea. The set will eventually get hot enough to melt the glue(especially that close to a tube), and you will have a big mess to deal with when it melts...Also you will have to deal with the the glue if you ever need to change the resistor in that socket or the HV/filament wireing going to it.
On most sets with a plastic HV cup there are two screws that hold the cup to the chassis, and two more that hold the socket to the cup. Remove them all, remove the cup, clean the everliving daylights out of the cup, clean and dust the socket and the cup mounting area, and reinstall the cup. This will solve most arcing issues commonly associated with an HV cup.
You said you wanted to change the HV rect filament wire and HV line to the CRT but could not find a suitable replacement. The cheapest and easiest replacement you can get is to find a 20" screen or larger 1980's-2000's CRT set at the curb or buy one for a couple of bucks at a thrift store/resale shop and steal the HV lead to the CRT from one of those newer sets(I do it and it works great). You may have to strip two sets to have enough to replace both the filament lead and the CRT HV lead. You can use the HV connector already on the lead from the newer set. Patching HV/HV rect filament lead with electrical tape is like putting a bandaid on a gun shot wound....It might help, but it won't stop the bleeding.
I don't mean to sound harsh, but it makes me sad to see you harming a set you seem to really want to have working properly through bad seemingly uninformed decisions.
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