Composition: 4, objects in upper part are distracting, would be better if done without them.
Technical: 4, The mechanical part seems to look like you oversharpened in post processing.
Appeal: 3, A difficult subject to make interesting enough to keep the interest of the viewer.
Challenge: 9
Overall Calculated Average Score: 5
Wowo this is very nice. It would have been nice to give a bit more attention to the background with a drop cloth or something to screen out the line at the top. But over all, very nice.