Nnice work as always man, I love the eye design...I hope that reoccurs in other skins/models. Some of the details, like the inset details or the bevelled parts are a little sketchy though, but the way it looks, it seems to be an unwrapping and zoom problem, not one of the skin.
The only real suggestion I have for it is that you use more contrasting shades of grey to white, to go for a metallic look. It has a nice soft look, but if you sharpen some of the details (the elbow area) and brighten some areas to make more of a metallic gradient look...it will make a big difference.
Definately like the theme your starting, nice work on this Sky |