This is wicked! I really like the golden tones and the sense of depth in this. All of your work is sharp and intensely interesting to me. I've been running and programming raytracers and 3d programs since 1986 (yes, I'm old). Too many people today make render artwork that is really nothing more than glorious eye candy... not you. Your's have style and rhythm and are of excellent quality.
You have too much metalic glow in your work. I love this one so much, but if the gears were a little less glowy and more "old, scratched, non-burnished metal", it would look a lot more realistic and I would even fave it!