Great to hear you have your guiding up and running Vincent, I know how we felt with our first guided image.
You have some good detail in this image. Well done.
The background does look a little green on our monitors, maybe some of this is due to area light pollution and there appears to be coma present for if you look at the stars in the corners of the image they are all pointing away from the center.
We had this when we were using our 8" Newt and corrected the problem with an MPCC coma corrector.
Hope the above comments help.
David