Here at team 1389, our minibot in its current form rests at an angle, pointed upward at about 45 degrees. While the hypotenuse of this “triangle” is over 12inches, each “foot” is not. Which one (or both) counts toward the size limitations?
MINIBOTS will be inspected for the volume constraint by being placed in a five-sided box (as shown to the left) with internal dimensions of 12" x 12" x 12". If the lid (the sixth side of the cube) does not seat properly, the MINIBOT does not pass this part of the MINIBOT inspection.
Note the orientation of the minibot inside the box is intentionally not specified
A few mentors on my team (including me) are signed up to be inspectors, and we stumbled across this site with some great power points geared towards handling inspections at the events this year, with the above powerpoint being the second one on the list: http://www.usfirst.org/community/volunteers/content.aspx?id=16375
if i understand your minibot correctly, it will fit within this 12x12x12 cube without a problem, which is all that matters.