[ggoldman]

Your design is interesting, but I would recommend that you do some more analysis on it for the next version.

I am concerned about how the frame would handle an impact on the side of either the front or rear (the two rectangular sections). It seems that (unless you have an extrememly beefy frame in the middle bar) that there would be some bending or buckling. From the impact there would be a large moment acting on the rectangular part of the frame, and since the two sides are not joined, there is not much supporting it.

Keep up the good work and the idea is great!