yup, I was right!
https://i.imgur.com/i7CqJ42.png
Added to the to-do list,
it checked at 120k almost.
was easy enough to check, pull the vert tube, VOM at pin 6, and point 52 is right at the back of the color PCB at the back of the chassis, easy to reach.
I will most likely replace C31 while I'm at it, even though it prob OK, and hopefully the retrace lines will be all gone after that, and at least THAT annoyance will be addressed,