Nice tones...I like the steel blue gray. I think you mith have crop down from the top a bit and avoided the blow out in the background and made your pattern stronger at the same time. Very finely composed.
Nice take on the challenge with the unusual subject made interesting. The only criticizm that I have is that DOF is a bit problematic, hard to see anything that is actually in focus. I am not sure if this is done on purpose or not. Maybe it is just me. (8)