This is one of those areas of sky that will consume as much telescope time as time/money allow. A clear, moonless Australian sky enabled me to up the luminance frames to 30 minutes and also take a single 15 minute exposure through a hydrogen alpha filter.
Combining the luminance frames using SD Mask and a simple Digital Development stretch results in much lower noise than the original image post while keeping the star brightness under control. This was then aligned with the Ha image in Maxim DL, saved as a jpeg file and combined with the Ha image in Gimp.
The next step will be to add in the 15 minute exposures for each colour.