I just can't leave it alone!
On the back of some more advice, I've tinkered with my Eagle Nebula image. I've slightly adjusted the midtones and highlights to try and put some contrast within the central portion of the image.
Here's the new version of my
M16 - The Eagle Nebula on AstroBin where the differences can be seen against the other versions. However I've also attached a lower resolution version of this image to this post.
Cheers,
Mario