Thanks Peter for your kind words and Steve I must admit I did compress it down a bit too much in future I will adjust my images to those settings you gave me.
As for processing after stacking...this makes great sense! Thank you.
This stacking think was a bit on the deep side for me at first and I'm just starting to get my teeth into it and am starting to get some good first time results.
Roll on for those really clear nights!
Paul