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I was also able to reduce some horiz related bars in the picture. I could vary it with the "horiz drive" trimmer cap, but I needed another 68pF cap across it to get it down to a decent level. The trimmer is rated for 10-100pF, so it looks like it's at around 170pF. I used a 4KV cap as I don't want this cap to flash over and do bad things to the horiz circuit....
Also tried to improve the focus on the CRT. This set is not adjustable, but the datasheet for the CRT, a 21CEP4, says it can be between 0 to 400V. Found it was slightly better at around 90V, vs the fixed 255V.
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