I have redone this image to include 4 hours and 40 minutes of Hydrogen Alpha data along with 3h and 10m of luminance and 5h and 10m of RGB data.
I blended the Ha and Luminance at 32% Ha and then combined this with the RGB data. Thank you Paul for your help.
I am trying the less is more approach and am happy with the way it turned out.
Full resolution image located here:
https://www.flickr.com/photos/134809.../in/datetaken/
Again any advice appreciated.
Thanks
Mark