Hi Graeme
I'm a rookie in this forum and have just read your message. It's a while ago, probably I'm a little late... but in case you still should be looking for a manual, I can happily provide one in PDF format; however, it seems to be somewhat preliminary since there are some blank places in the text, and some of them are filled-in by hand-writing. Unfortunately there is no issue date contained. Please send me a PM with your email address, and please check what file size you can receive (it's about 1.7 MB).
If you should have got a manual during the last 8 years, I kindly ask you to provide it to me - your version might be somewhat more recent than mine
My GO8 programmer was salvaged from the dump of a former employer and I did not operate it since then, mainly because I don't know the polarity of the external supply and whether it requires AC or DC... Any information on that, please?
Best regards
Robert