Good effort. Had a closer look at the larger version -
http://www.gco.org.au/st8/C14_Images/GC2070-RGB.jpg
You could almost mistake this image for a narrowband image instead of a conventional HaRGB blend. Not sure what happened there...still some great details on display - attributed to the Ha data no doubt. Managing stars in HaRGB blends is difficult and I suspect you experienced this. The stars from the Ha data are tight and small compared to broader filters such a LRGB. Its near impossible to use the Ha data alone for luminance. I think the image would have been better if you also capture some luminance or created a synthetic from the RGB data. This would bring the stars back and provide a more asthetic image. Perhaps next time...look forward to seeing more.