I think you've got a good image there for sure Jeanette. Battling with data from a camera insensitive to Ha doesn't make it easy though! Version 3 is much better.
I'm never sure it's a good idea to tweak other peoples images but I only try when I think I see good data. Hope you don't mind!!
Anyway, I evened up the histograms, lessened the green cast and highlighted the reds a bit more. It's hard to do on a tiny jpeg but I think you'll see the effect I'm driving at. You can be the judge whether it's an improvement or not!
Cheers, Marcus