Revision 1/18/2023:
I wanted to improve the stars and see if I could get a bit more detail with newer methods available at this time.  That is just about all that I got.  I did do a simpler WBPP, simply using all of the subs, rather than splitting the best out to form a sharper Luminance image to overlay the colors.  Otherwise I slightly reduced stars a bit vs. the original version, yet I think I got a bit deeper with some of the many tiny red galaxies that are scattered about in the background in large clusters.  These do not look like much other than faint smudges on the background when viewed full scale.  So I think I got a bit more out of the dynamic range with the new methods.  This allowed me to get better definition and visibility of the faint star stream moving away from M66 and also the more extended star streams of the other galaxies.

Seems like this took a lot of stretching to get what I wanted.  So meant to be viewed up to full screen on a decent sized monitor.  The image certainly falls apart upon pixel peeping.

Original Description:
I have been sitting on this one for a while because I ran into some issues with the data that made processing difficult. I may have solved the issue with the data and also the origination of the problem as well. However, the data solution has allowed me to post this in at least a presentable form. I am finding that my subs, and other calibration frames are having a fine raster line-like defect on some subjects. Turns out that it is a software driver issue between acquisition software and camera. I hope to work that out soon. However the data is easily resolved using a PI script (CannonBandingReduction). Pretty amazing little fix for those that are interested. And this is not even a Canon camera!

This is so often presented here, that I will not add more to the subject other than it is a beautiful grouping!