It's interesting how the controls interact and how different signals affect it. Here's the same DVD machine playing different program material:
For this DVD, the gain was turned up higher than for the test pattern DVD. No gap on the right, and there's probably still some warping, but not much you would notice.
Now that it basically works, I can spend some time finding the best compromise with the various adjustments. I'm still curious about that vertical bias control, too.
I was hoping to avoid it, but I need to remove the CRT to recoat the bell with Aerodag graphite and clean the inside of the safety glass. The CRT is shedding flakes of aquadag and some of them end up inside the cover. If you look back at the earlier photo of Hilary Swank, you'll see a big black flake that's not present in later photos. I tried blowing them out with a little rubber hose, and just created a mini blizzard of black flakes, so the old coating is not done shedding.
Phil Nelson