[Spartan Rex]

For further explanation: the shoulder joint is quite pose-able for X and Y axis rotation.

Impressive under taking, best of luck.
I can't but help think of another articulated droid I'd love to see realized in 1/6:
http://www.turbosquid.com/3d-models/amee-robot-3d-model/243372

Could you pull her off?
My colonial marines could use another party member.