[Astroman (Andrew Wall)]

Great work mate, although your method is not quite right for processing, if you duplicate the image then stack, you are stacking noise aswell. The idea of taking several exposures is to reduce the noise in the image but keep the aligned stuff like stars and nebula. Start off with a few shots like the one you have (5 images @ 10 seconds) then process them the same way, I am pretty sure you will get a better effect.

At least give it a go, doesnt hurt. Welcome to the world of Astrophotoraphy!

Other guys here may have more ideas on the processing side, who can guide you through it.

Do you have the original?, there is a ton of detail in there but would need original file to work with. I tried it out on the posted image but the compression was too great.