Hi Adam, this is the log file from my latest attempt, from what I can glean from it the only thing wrong is the error message/invalid response when trying to slew (slew to zenith attempt).
I just tried Green Swamp Server but nothing I do will connect it to the mount, it doesn't see the serial port, even though all the settings match the mount. I will have to RTFM!
In the meantime my other laptop has been going slow for the last few days and nothing I do makes any difference.

Did I mention I hate Windows? What was wrong with DOS anyway?
Edit:a bit later and success, of a sort. I was a technician in a previous life so reading the manual was always a last resort but it's amazing what you find out when you actually read the f*&%* manual.

GSS is working, everything talks to everything and slew to zenith works, sort of - it slews to a horizontal position rather than vertical but that just has a to be a setting somewhere. All I have to do is start NINA, select the mount, click connect and bingo!
The cabling is slowly getting out of hand, and I haven't even got a camera connected yet! I've had to use a powered USB hub to get enough connections so I can use a mouse - I HATE using touch pads on laptops!!