More progress this week so far: I cleaned most of the components in the HV cage, removed all of that white silicone, and replaced more of the incorrect or poorly-replaced parts.
Silicone has been removed, and the focus-rectifier diode has been taken out. I chased all over for a replacement plate cap for the 1X2 tube (not yet installed), then later found I had one in my parts box already!
You can see the two "bloody stumps" of the cut off filament wires to the 3A3 HV rectifier here, as well as some of the dirt and corrosion before I cleaned it up.
Here, the replacement of the HV filament winding is in progress. I installed two loops around the flyback core; we shall see if this is appropriate for the wire I used.
A few more parts to install or replace, then some Deoxit on the controls and tube sockets, and I will be ready for the first power-up, I think.