Trev you have well and truly cooked that one, I think something is amiss further back in your capture as the data coming up originally isn't clear and the RC does produce really clear images. and at 9 min worth of data each sub i would have expected alot more nebulosity. here is 3 x 5 min with the 40d in my back yard just outside of mandurah so LP is alot less than the city, but still there
http://i700.photobucket.com/albums/w...nel-2-post.png
same image just a crop to show at native pixels or there about depending on photobucket.
http://i700.photobucket.com/albums/w...kle-finger.jpg
Have you looked at collimation? ect ect, because its not a guiding problem the stars are round. I believe when you figure out the root cause then everything else will start playing the game. That is just my opinion for what its worth.