Here is my Cygnus Loop in HaS2_O3_O3Ha , from my suburban Louisville, KY backyard. It was shot with my ASI183mm-Pro and Baader 36mm NB filters, using my Samyang 135mm f/2.0 at f/2.8 (mainly). Processed with PixInsight. Cygnus Loop is Super Nova remnant in constellation Cygnus and is about 2,400 light years from Earth. The Cygnus Loop includes the Western Veil (aka "Witch's Broom"), Eastern Veil (aka "Bat Wing" or my preferred "Joker's Face"), and Pickering's Triangle.
Ha 240sec x 245 at f/2.8
Oiii 240sec x 123 at f/2.8
Oiii 120sec x 140 at f/2.0 (mistaken wide open)
Sii 240sec x 153 at f/2.8
This color palette is a slight modification from HOO, and is close to true color.
Red Ha + Sii
Blue Oiii + 0.2*Ha
The Ha into Blue is meant to be a surrogate of Hb.
I have also added a mild Hue "S-Curve" to move some of the Oiii from Aqua to a truer Blue and moved the Red to deeper Red. This Hue adjustment is much milder than what I would do for SHO palette.