My first version of M31.
I used 93 subs of Ha, 100 subs blue, 119 subs red, 100 subs green and 100 subs luminance.
I have thrown away 47 subs of Ha due to haze or high thin clouds.
With the latest Ha upload I can use 45 out of 70 also due to haze or high clouds.
So in my next try I can use 138 Ha subs in total.
In this version I combined Ha with the red channel using the NBRGBcombination script in PixInsight but after my experience in using the script I'm not satisfied.
So I did a search on the internet and found the follewing:
https://www.youtube.com/watch?v=CDBejs636hk
In this video tutorial a other technique will be shown in combining Ha with the LRGB data.
The first part of this video can be skipped, look from 55:20 minutes.
Maybe interesting.
I will use this technique in my next try.
Here the first try: