Hi Steve, upon reflecting on Greg's comment earlier I was thinking what if you make a luminance frame consisting of the entire Ha frame with just the two blue reflection areas in the lover right blended in from your L frame? Then you should get a very crisp luminance frame with all the Ha detail, plus reflection nebulae but without Alnitak spikes. And then use that frame on top of your RGB?
Cheers,
Rolf
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