2012 Bumper rule gray area

[Japper]

[R01] states, "The robot must have a Frame Perimeter that is comprised of fixed, non-articulated structural elements of the robot. The frame perimeter of a robot is defined by the outer-most set of external verticies on the robot that are within the bumper zone which is between 2 and 10 in. from the floor."

To me this reads like it is only covering the side perimeter of the robot and not the bottom as I am trying to see if we can incorporate an extra set of wheels on a swing arm under the robot to allow us to lift our (2" from the floor) bumpers over that metal curb in the middle of the field.

Any thoughts on that?