Hi Elliot
You should be happy and releived all those tedious adjustments have paid off.
Part of the game unfortunately.
Your result is very good.
My subjective thoughts:
I would move everything to the right a bit so that the horse and flame are centered together.
There is a trick you can do (easy to do in Photshop) is 'area selection enhancement' (my term).
ie: Select an area (say the flame) and adjust the saturation and colour balance.
Some might say this will cross the border from AstroPhoto to AstroArt but I don't think so.
All good fun and well done
