Yep, It'll come, as Ric says we all deleted more than we saved or posted at first
It's a start and i reckon that bug has got a hold already.
would be interesting to see more stacked but i expect you will be limited ultimately by the length of exposure. I 'd say see how close you can get to a minute exposure.
Also not sure if the focus is out a bit, are you using a Hartmann Mask?
see this link for a discussion on it:
http://www.iceinspace.com.au/forum/s...hlight=hartman
cheers
frank