Well done for getting an image down Graham, we have all been there...bloody weather
. The HaLRGB certainly gives the impression of some extra detail but the blending is a bit off. The LRGB, however, is a very good mage, very natural and nebulous and, as you say, your stars look good. More of us should shoot this nebula in more natural palettes like this, it really is quite a lovely bit of sky in RGB type colouring.
Here is a great example and yours isn't too far off this either Graham, top job
Mike