This is a kinda interesting image & shows M33 in Ha (7nm) only. I was planning on getting some L,R,G,B to go with it but never got a chance due to the weather gods so this is only 8 X 600secs of Ha taken through normal kit - just a quick process for posting. I should have probably done it around the other way (like Fay's great image) & got the LRGB in France then I could have gotten the Ha from Bromley... Some interesting swirly bits going on with some of the Ha clumps..
Oh Well - can hopefully add to it at a later date.
John.
(http://jpastronomy.co.uk/graphics/OAS/M33-ED80-ATIK314L+7nmHA-09102013-1.jpg)
i could do with those ha clumps! mine is clumpless
Like I said would be interesting to overlay this with your LRGB....
Ok