Tom,
Great result on a really fun object. M1 was one of the first things I saw posted that drew me into the hobby. Of course, it is small enough that getting a truly detailed image of it like you have here is not easy. It is definitely not what I would call a beginner's target.
You have some very nice colors and some faint detail coming out in this version. Very nice.
I now have an optic that is at least big enough to give this a go, so it is on my future imaging list for sure.
ML