Hi Jerome, this is a good image of this famous pair with your small scope, nice work
Getting colours that you like when processing wavelength ordered emission line data from three filters is pretty difficult and yes it can drive you spare
...the only thing I would say is that most emission nebulae imaged using
three filters should not look essentially bi-colour ie two toned, there should really be three clearly different colours mixing across the object. Many people process this variation out in the search for what they see as
pleasing to the (their) eye but doing this removes some of the reality from the image not to mention essentially wasting the time of collecting three data sets.
Thanks for sharing
Mike