It is my original design
Okay, but I must admit, that I was like WTF? when I first saw it in the TRO and did not liked it at all. But as with a lot other Mechs I did not liked at all instantly it turned out better looking and better looking and now I really like it. Needs some time to get used to the no-arms-style and the hip-mounted guns. Well, and they explained it pretty well in the fluff text why it looks how it looks. Which leads me to the question what was first - your design or the specs given to you for this mech?
Nice idea the Mecharm on the truck in the background, especially since this Mechs lacks them. And the Fist reminds of House Steiner's fist on their crest too.
Very cool approach! +Love the spare parts rig in back.