[thefro526]

I like it. It looks very simple and very solid and like you've left more than enough space open to mount a manipulator or what ever is going on it. I have two questions though, what's the approximate outside dimensions, and what's the offset of the center wheel if at all?

I ask that because from the render makes the base look pretty square and if it is I was wondering if you even need to offset the center wheel because in my experimentation I've found that the shorter your wheel base is the less of an offset you need.