Last night was clear but a nightmare . USB/Drivers conflits.. in the dark. Just what I needed ... NOT! Turned out one 5m USB2.0 extension I bought is what's known as an
active cable. It is detected by the laptop as a USB device when plugged on it's own in any port. All sorts of bells ringing... GBUSP dropping when guider's plugged in or when imaging camera was downloading subs. Packed up at 8:20pm
All sorted out now trying again tonight.