[old_tv_nut]

Please feel free to ignore anything I say, as I have no knowledge of this set whatsoever, but that won't stop me from asking questions <grin>.

Is there an ion trap and/or some beam alignment components on the neck?

Are the effects sensitive to yoke rotation? If so, can it be improved by rotating the yoke and then rotating the whole CRT and yoke together to get correct picture orientation?

Is your degauss coil strong enough? Can you get to all sides of the shield? A bulk tape eraser could be worth trying.