Well I thought I'd update this thread to reflect some news... I have the blues.
...and I couldn't be happier.
Compare that to the "before" (Believe it or not, that picture is supposed to be CoLoR)
Now Mr. Spock's uniform isn't violating regulation.
Captain Moody advised me to put the CRT tester/rejuv into the test position and keep upping the heater voltage until I saw some life on the blue gun. I did as told, and suddenly, around 8v, the blue gun jumped up and pegged the scale!
So I know have a set that functions on all three colors, without a ton of work. After re-running all the tests, the tube now shows very strong, and the pictures back that up!