Uni model update

Well its been a busy week, what with other assignment work.  But I've managed to push ahead with my model.  The basic model is almost finished, I am finding it hard to keep this model within the Tri limit and to include enough detail. 
Today I hit some trouble as I figured out that the concept art I'm following would not allow the mech to walk very easily. 
So I'm having to try and create my own leg mechanism that would still keep within the concept and also allow the mech to walk if I ever came to animate it.
I foresee that a lot of the detail will have to come from the texturing.

Again, most of this is just extruding from a cube or a cyclinder and adding edge loops.