WOW, just a follow up on my recent purchase.
I had a Wells K7901 that I threw in my Pole Position II for a future repair project. The monitor was capped, but still had problems displaying the color red. Tried swapping transistors, pots... nothing would work. Threw the rejuvenator on there today for the heck of it and it now looks great. After two successes, I think it paid for itself already.
Now, to just get the Pole Position to stop the restarting loop problem... But that's a different day.