Wow...fantastic.
Something I do ..which is naughty...and well also before I started doing flats etc..was to stack everything together and use that stack as my luminance...my recent Lagoon ( second more data attempt) I did that and the luminance came in at 10 hours something
...I did that because I screwed up with some subs 300 seconds and some 120 seconds so doing flats etc seemed like too much work...anyways now you know.
So I guess I had some detail right there
You got the knots which is what it's all about with this object..well done.
alex