The problem with the data upload limit for attachments has been fixed. I have restored it to 30MegaBytes. A recent forum software upgrade was responsible for the changed limit. Please accept my apologies for missing this when upgrading the forum sofware, Mabula.
This is an artificial LHaRGB image from OSC. I extracted Ha from OSC+duo narrowband filter used as Luminosity and Red channel. Another RGB image taken from the same optics without narrowband filter was split to monochrome Red, Green, and Blue. These files were combined in combine RGB tool. The weight of each channel were adjusted. Total integration times were 13200 seconds for duo narrowband and 13200 seconds for RGB.