Re-stacked one of the avi's i got Tuesday night but this time i found some other functions that seemed to make a big difference. 599 frames stacked in registax4 then instead of arguing with Gimp and these RGB split images i played about with RGB in registax. Was amazed at how much more detail came out before i even got round to running it through Gimp. Slowly but surely i'm getting better, just need to sort out the focusing problem and get a 3x barlow to enlarge the image some more. I'm very pleased with this one, more so when i compare it to the others i have done.