New 807s arrived today and I had just enough time to pop one in and give it a try before I get ready for the convention.
I haven't measure the HV output, but I can already tell it's working better. I can vary the brightness over a large range and the image stays sharp and focused. Before it would bloom and get blurry.
The tuner needs a deep cleaning. Tuning is a bit of a challenge right now, but when it's locked in, it looks really good.
Sounds could use an alignment as well but that will have to wait.