I gave it a go, and I managed to fix my screen flickering. I ended wrapping the entire LCD controller with copper foil tape. If you’re careful and have the right tools, you wont damage a thing.
I documented the process over on the MacRumors Forum:[br]
[https://forums.macrumors.com/threads/macbook-pro-retina-mid-2012-screen-flicker-fix.2265830/|https://forums.macrumors.com/threads/macbook-pro-retina-mid-2012-screen-flicker-fix.2265830/]