I thought I had commented on this one already, but maybe not. I checked out your concept drawing on your blog page and the MF sure looks side heavy the way it's depicted. It looks as if it's not stuck in the ground far enough for it to stick out like that and remain there. Is your concept drawing just "fast and loose", and you've already accounted for the mass of the vehicle when you put it in the "ground". Just something I noticed and thought I would bring up.
Other than that your work looks great. I love all the detailing you're putting into it.
Chris