Not a fan of this colour scheme, what about the one where you end up with yellow outer and blue inner regions? Great detail Mark and smooth processing.
This is what I was talking about in the post on the other image.
Ha as green will dominate as Ha is the strongest signal. So use pixel maths to multiply the O111 and S11 and use long subs - 20-30 mins bin 2x2 for the O111 and S11 to get a strong enough signal.
If you do the above and pixel maths (say multiply x 4 or more your O111 and especially S11) and then use curves to get the right mix you'll even it out and get some nice mustards, blues going instead of all green.