Thanks to all for the comments. Happy you liked it.
Since it is a difficult subject from your latitude I leave a link to the individual RAW channels (L-R-G-B). The luminance was calibrated with CCDStack and integrated with PI. The colors are to be assembled (1:1:1). There's a bad gradient due to street lamps placed at 40 meters from the telescope but you can remove with DBE tools.
(82MB)
http://www.starkeeper.it/RAW/M33Raw.rar
I hope will please you.
All the best,
Leo