That's a good M33 Dunk!
Some nice detail coming through, you will need more data for sure to bring up the colour.
I's very like NGC 300 to process.
You could try to push it but you just end up with colour noise on the outer spiral arms.
Here's my M33 from last year.
http://www.iceinspace.com.au/forum/a...e.php?a=150437
This is 112minutes of data, needs more but might be handy to compare since your using the same unmodded camera.
Cheers,
Justin.