Hey Phil. This is a lovely wide field perspective. Very pleasant. I'm not too certain of the colour though. Balancing the RGB data with the strong Ha information can take some work. I feel certain if you spent some more time you could extract greater detail from this image. Still a very good result to be pleased of.
Wonderful image - but i am slightly confused, there is evidence of rotation on the upper left and lower right of the image in the corners but it is spot on on the other two diagonals? I think you have done a fantastic job at capturing all that Nebulae!! Its like that other image you posted that blew me away.
Again so much detail I never new existed in M42. Like your other wide field shot this one is stunning. And I think your giving the Hubble a run for its money.