[Arran]

I actually don't mind restringing dial cords, though I'm probably a bit rusty with it now. I have a thing with repairing 8 track cartridges too, but some people like knitting. The pulleys may be on the back of the back plate, on some sets the plate comes off and they are mounted on some brackets, on others they are riveted onto the plate itself, I'm not speaking of this model just generically. Without seeing it I really have no idea how the string would have been routed, but there is usually a drum on the tuning cap with an expansion spring on one end, and just the cord on the other, but there is a lot of variation, this isn't permeable tuned is it? 
Regards
Arran