Good for you on the sale and it is interesting that you now have detail in the sky so perhaps you are ahead of me in I just downloaded some plug-ins and one revealed the sky detail ... so however you go about it ... keep it up .... apart from the rocks you have presented the picture along the lines I and others suggested
It is funny how people attribute good and bad things to actions which we think are simply the logical and correct thing to do ... though in the end you will get better Image Quality if you get closer to what the final result will be in the camera ... I probably knew that earlier in my life but it came home with a vengence when I started digital with a 3.3Mp camera and a target of A3 prints for camera club display in competition with people who had not changed to digital at the time
PS ....And LOL the sold photo is not the photo you posted