Two potential replacement CRT Amplifier Cards arrived today (Thanks Curt!). I’m going to undo my blue/green swap and see if I still have the visible banding on blue and then try a new card to see if the G2 pot is a little cleaner. I’m confident that one of the two replacements will be fine.
I picked up a heavy duty power cord (14 guage) — it was $3 at the computer ‘dump’ so why not? I haven’t installed it yet, but I honestly don’t expect anything to change by swapping the power cord.
Overall the system seems to be getting more stable, I have some convergence drift happening but I keep friggin with things so its expected. I really need to re-do the full setup from the start.