Ok I got an obscure one for ya'll. I got this Channel F Model 2 here with a rolling picture. I've adjusted the pots for the RF & was able to get rid of the static, get color back but the picture still rolls. I tried recapping it & even replacing the metal slug in the pots that was cracked, still rolls no matter how much a I adjust it. Can't even get it to slow down or speed up. Any ideas?