Time for a change. The CTC20 began exhibiting a vertical issue along with its funky shaky video with color. Voltages on the 6GH8s are close enough that I suspect the video detector is possibly bad. This could really lead down along road to get this set right before daring to assemble it.
CTC20 jig.jpg
I unplugged everything and put the CTC16X chassis up, plugging in all the tubes and powering up from 70-100 volts over an hour.
The difference in CTC16 and 20 chassis is remarkable.