Well, it is long time since my last post, as it usually is. A number of people provided constructive suggestions on how I might improve my work flow for the Lagoon Nebula mosaic. I want to assure you that I spent a lot of time thinking about what you said, and I have tried my best to achieve a more pleasing result. Here are the results of my latest attempt. I have attached thumbnails of the new and old [H alpha, Green, OIII] images for comparison. I like to think that the new one is an improvement, though perhaps it is only different. I am still struggling with the Hubble palette, but I like to think that I am making progress, learning how to manipulate the colours using more sophisticated tools.
The new full resolution images are here:
https://flic.kr/p/VaU7tw
Thank you for your good advice.