For those unaware, I bought a lightly used GDM-F520 almost a year ago, with an issue - severe ghosting. This problem is common on F520's and internet indicated it was an easy fix.
To make a long story short, it wasn't an easy fix. The problem area is internal contacts. I tried to improve it in various ways, while havivng some success, I never quite got it as good as it should be.
Until now. The solution was contact enhancers, which I had avoided due to the ridiculous cost (A tiny bottle of Stabilant 22 costs 50€). After one day getting mad enough about this to scour the internet, I found one store in Germany selling a cheaper alternative, DeoxIT Gold.
And it fucking worked. It actually fucking worked.
So, now I finally have it. I have a mint GDM-F520 on my table. The absolute finest CRT ever made, in it's prime condition.
To put into perspective just in how insanely good of a condition this monitor is in, it's 6500k preset is off by mere 50k.