that 4th pot does the same thing as the v size pot. widens the image. i've tried all combinations of pot positions, with anything vertical related. the only thing that resembles a split image is when i mess with the v hold.
tomorrow night i'm going to de-solder the blue pot entirely and see what happens.
i should mention a little history in case it is usefull. this was a karate champ original monitor that i have transplanted in another vertical cabinet. it had some slight burn from it's years of being karate champ, and the image is burned showing that this screen has NEVER had anything on the left 1 inch of the screen. been off center since the day it started operating.
and thanks for hanging in there. who knows, maybe i'll get this thing fixed some day.