Hey Paul,
I do like cloudscapes but they are difficult to pull off......I think you were pretty effective though and only wish you had moved the 24-135 a bit more to the right....to get the sun in the ROT line.......but there may have been something there blocking you.....so I cropped.....this eliminated the 2/3 proportions....but felt the comp was still strenghtend by moving the sun more towards that line and I didn't want to cut any more base and none off the top. Let me know what you think of the crop.