Based on observations made with the European Southern Observatory telescopes obtained from the ESO/ST-ECF Science Archive Facility.
I use these images
3 HeII => L
3 HeII6500 => L
1 b_High => Blue
1 V_High => Green
1 Halpha => Red
With some bias and Flats, that I stacked using DeepSkystacker.
Second Step was to level the histogram of the up and down frames so they coud match.
Then Photoshop, for Level, LRGB assembly and high pass mask.
I try to mask the missing pixel..
And finalise the work with some Level, and colors fix.
Hope you like it!