A nice image overall. Focus looks to be off a tad. The FSQ when in focus really snaps sharp and stars become pinpoints.
Ha is best done as a lighten mode layer and delete the green and blue and another layer as blue and delete the red and green channel. Then use curves as needed to boost. I wouldn't use Ha as a luminance otherwise you get the salmon colours.
Star colour is good and stars are quite round but you'll get rounder stars and better views with your STF8300.
Greg.
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