After seeing some of Brian Kescenovitz's amazing work, I had to try one myself. His Schism Class Urban Assault Mech was my inspiration, and can be seen here .
I am quite pleased with the result, except for the proportions of the torso. Due to balance issues, the legs only have one pose. However, they have a full range of motion, including two axes of rotation in the hips. Enjoy and thank you for the comments/critiques.
Ditto on the use of those black pieces on the back. The only thing I don't like here is that the waist and torso seem small for the size of the legs, but I like the overall design, and I really like the arms. Reminds me a bit of the Avatar from Battletech.