I've been trying to learn about and fix some arcade CRTs. This 27" D9800 works fine except for a few problems. Red seems to bleed out the side of images and just seems off. I can get the bleeding to stop by turning it down, but then the picture looks dull. Text/images become blurrier as they get closer to the edges of the monitor. If anyone has experience with these, given the symptoms what are the first things I should be looking at. I've already gone through the obvious color calibration and flyback focus etc.
I'm not sure if this information is relevant, but I am running it at 640x480 31khz progressive through VGA. The CRT is from 2009.