I tweaked the vertical linearity and it mad a minor dif at the top, right top corner is still worst, may never get that perfect.
THIS time I know the placement of the neck parts are right, as i used the GE CTC-15 clone as guide.
https://i.imgur.com/jN1Qj1g.jpg
CTC-16
https://i.imgur.com/kjHeZ2J.jpg
clone
convergence yoke just inside the black area, purity magnets, red area, blue lat, just beyond that.
I may play with it more this weekend, but i NEVER did replace ALL the resistors on the convergence PCB, caps, the selenium device, but not all resistors, and they DO get hammered, this may be a source of trouble..