Thanks all. That Operating Manual looks exactly what I am after. I also wish to source a workshop manual. there are a couple on Ebay that are PDF's, so it is difficult to determine whether they are the correct era. I may just have to take a punt.
Ive also requested to join the FB group.
I have. No response :-(Why not post a question to seller on Ebay? The worst he can do is tell you to do one!