Thanks for the comments guys.
@David and Ross – calibrating my RGB filters/sensor combination is still on the to-do list.
I’ve just migrated my guide set up from a side-by-side configuration (which produced quite variable results), to a guidescope mounted on the OTA rings in an attempt to poke my head above 2 metres again. The autoguiding seems to have improved although there are still a few things that need attention.
Despite the dodgy seeing conditions, the recent series of clear nights has been helpful in applying lessons learned the night after they were learned, rather than having to wait weeks between sessions.
Cheers
Dennis