Step 1 )Stack R G B Ha OIII SII subs with  script Sirilic/Expert.py
Stacking Settings

Step 2) For each Ha, OIII, SII stacked image:

1. Script Processing/AutoGradientRemoval.py
   
2. StarXterminator : Disable generate star mask, Disable unscreen Stars
   
3. If the SII has huge Halos, remove the Halos with Affinity Photo
   – Transform layer to RGB (Image processing/Composition/RGB Composition) fits file
   – Open the file in Affinity
   – Fix the halos
   – Remove unnecessary layers
   – Export as TIFF with Pixel format = RGB 32-bits
   – Open TIFF in SIRIL.
   – Image processing/Channel Extraction/Split CFA channels.
   – Continue with one extracted channel
4. NoiseXterminator – Denoise :0.50
   
5. BlurXterminator
   
6. Save as STARLESS_….fit (32bits)