It is so complexe, great stuff! My eyes keep focusing/resting on the yellow part though, maybe you could put more yellow on the engine itself ? Great wires!
Honestly, it looks really really good. Maybe add a bit of material variation and/or color variation to help with the composition. It is a very busy object, so maybe what's your focal point, where do you want people to look? What's the most interesting thing? Like @lilium stated, the only color is the hooks, so how can you balance that compositionally? Alternatively, a greyscale (b/w) image might do the trick by emphasizing the texture of the details. The color isn't helping much anyway, probably worth a shot.
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Great success!