Thanks for the comments Gary and everyone.
You are right Gary, seeing is really the killer at the moment.. i'm getting to the stage now where I will throw anything out that wasn't better than my last attempt.. no point going backwards
I don't think i'm reaching the limit of what I can pull out with my equipment just yet - with better seeing and slightly better focus, and more frames, I know I'll eventually get a crisp sharp Saturn - something i'm yet to achieve.
But that's what keeps you trying every night, getting up at 2 or 3am and getting 3-4 hours sleep before work the next day!! Trying to get that darn perfect image! It's a neverending pursuit..