Well done, mate. My first LRGBHa was just 10 hours by comparison. But, back then, that was considered a decent amount of time. Nowadays, nothing below 20 hours, lol!
Agreed, re: colour, if you can tune the levels and add a bit of selective unsharp masking, you'll be on to a winner.
Try this one again in a year's time and see how you fare then.
H