Looks done, and done well. Good color, dramatic sky, I don't think I'd mess too much with this. Is something bugging you about this Harry?
Normally on my pieces I reach a certain point and look at it from a respectable distance and it says "enough, I'm done."
Trust your feelings on this, if you feel content it's finished then it probably is done. If something is nagging at you then I find the best thing is to leave it for a few days and then look at it fresh with a new, critical eye. Usually whatever was nagging you hits you straight away.
But as I said this is good, works for me. I've seen your other posts and I very much like your work and your use of color. Keep it up!