Thanks Andrew. I had a look back at the multitude of shots after I posted here this morning and checked the ISO and exp times. I see some did guide and even stack. I guess the comet is going to be away from the sun soon but still visible for a while so there will be other oportunities to do guided shots from dark locations. It's still in the morning sunrise right now so it might be time to find a nice skyline SE and shoot wide while it lasts? I'm doing the drive tonight at 2:00am with my daughter to Crago at bowen mountain and I'm hopeful the eastern horizon will be reasonably clear.
