14hrs of excellent data Bert. Admire the dedication. Impressive FoV. Your presented image has magnificent details but the dynamic range significantly suppressed giving a mono tone feel. The area is a tough one as it does have many bright features. Perhaps back off the dynamic range adjustments a little and let the highlights and mid tones start come back through.
This was purely an exercise to see how far the system could be pushed.
The reality with a fast system is that the previously unreachable dimmer stuff rises above the noise and mega data still has to be collected to minimise the noise. In this Universe there is no free lunch!
I had a tinker at this data. When you stack the data you should scale it at the same time. It needed to go through CCDstack to open the data out again.
I did not stretch to hard myself but noticed that this looks like a median combine. I think sum would work better for this data.
What filter are you using. Is this NII?
Anyway, I did some stretching, smooth background a little, and did a curves adjustment too it. I think your original version was black point clipped and had this odd look to the background. I find less is more. You may not agree. I had to mask in the core too to get it looking less blown out. If you stretch the data too hard with something like shadows and highlights it can look too flat.
Here's my go at it, I prefer less contrast than the previously presented efforts. I particularly like the star field of the other galaxy coming through.
