Thanks Anthony
I'll keep chippin away and it'd be great to crack on except the clouds are not behaving after the sun goes down at the moment. I'm reasonable lucky to be in Tatura but I have a basketball stadium and soccer ground about 100m behind the house so when the floodlights are on (most nights) I may as well be in a capital city. Hence I don't point the scope north and it's another reason for the switch across to narrowband filters! Cheers