/diy/ - Do It Yourself

So I did some progress figuring out how it works but I still have issues identifying the various parts. the + and - for the cathode heater was obvious and I believe the focus pin is for the component that focuses the electron beam, however I still don't know what the various colour pins (KR, KB and KB) are for and what G2 for "screen brightness" does. Additionally what is this metal curved thingy for? I found nothing about it and all I could think of is that it touches the graphite/conductive metal inner coating of the glass. Can anyone tell me more please?