Echoing what's been said - there's a very good image here already that can be further improved with cropping off the left side & digging out more details.
Also there's something odd with Lambda Centauri star itself
I busted out the LHE in Pi and have sharpened it a bit. Attached is a crop of the centre to show a bit of the detail. I still need to finalise it a bit, but I think that is an improvement.
It is a bit black clipped on the red channel. Not sure why it keeps doing that, but it is a problem. Seems to happen when I do the LRGB combination of the Ha.
I also noticed that changing the reference preview for background neutralisation can have a big effect on the finer details.
I forget to mention before that there was a bad refplection on OIII. Hence the weirdness around Lambda Centari. For some reason it is only my OIII filter that does that; almost as if I have it in backwards...