That's fan-bloody-tastic Dave! very worthwhile processing, actually a pretty good M33, well done dude
Great comparison to what you had to work with too, most would probably have given up then...
Sometimes I have had pretty crap data come down too and thought aaaah crap, this will be utter rubbish, I won't get a good image outa this
....only to sit down, persevere and come up with something actually not too bad. I recall having these feelings on all but one night (the Moon, cloud and seeing were all conspiring to ruin most of my data, or so it seemed) during the multiple nights of collection for
THIS image ...go figure
Mike