Thanks Guys
Yup, I fully understand what you are saying. I was going for a different look and feel with this image - I've mostly failed, as I'm now going to explain what I was after, and you shouldn't need to 'explain' what your photo is about if it works!
The picture, as stated, is a composite. The sky and foreground are one picture; the digger, soil mound and concrete pylon are another. These two I've put together in photoshop.
I wanted the pic to say, here is the magnificence of nature and here is the attrition of 'man' and his machines encrouching on this wonderful world. Hence the digger off to the right edge. I could make the digger image lay on a third and also make it bigger (get closer) but that would no longer make the statement, for me, that the current image does.
Thanks for all the feedback, it's very much appreciated. Here are the changes (done quickly, please forgive me) you suggested:
Drew