Follow-up to my Trash Picked TV 'RGB Mod'

A follow-up to my previous video about this trash-picked TV I did an RGB mod to. See: • Trash Picked TV RGB an...
** Headphone Warning!! 15.7khz deflection may be picked up by my camera, so do not watch if CRT whine bothers you. **
In this video I show how I finished off the TV with connections -- but also how I'm having a problem with color purity issues. (Unrelated to the mods I did.) I try to fix them by changing some parts out.
If you have suggestions as to how I can fix these issues, I'd love to hear from you.
TV details:
LXI 19 inch Color TV
Model No 934.49019990
Manufactured: September 1999
Serial No: V35953489
Made in Malaysia
Sold by Sears, Roebuck and Company
Made by: Funai