So I guess the next step with this thing is...
Go through the whole video amp circuit, video detector → video output, and make sure there are no more old resistors left.
This will not make any difference, most likely as 75% have been changed already and the old checked in circuit, but this way I can definitely say it's NOT resistors, will also put in the new coils at the video output stage, ( got them, might as well use them ), will also do a 3rd check of the replaced caps in the area. :/ mostly .05 paper caps (coupling) replaced with film type .047.
When done, I will attempt to use the 12lp4 for the first time, which will be a bit tricky cause I got to work out how to support it safely.
I will most likely try the newer trap, as the old one seems very weak.
There are very detailed instructions about how to put on the ion trap in the RCA 630ts service guide, mentioning “ion trap flags” in the CRT, and lining them up, but it was written for the EM version, not that different but, I am to assume the the arrow stamped in permanent magnet trap is to point to the screen?
https://imgur.com/byyV6dg