Would a scan of the sweethearts schematics  help at all Gav.
From memory dont know anyone who has a cover girl

I think it would Millsy... im comparing pics of inside the cabinets on IPDB... both look very similar.
The Jones plug in question, im getting some cranky voltages from... namely 69 - 70V on 2 places... need to find out whats going on here as most of my voltages are wandering all over the place as im trying to read them>
I dont know anyone with a Cover Girl either... im comparing to my Bank A ball which is some 3 years later... not sure its much help.