This game is simply a scaled down version of OverDrive. We use a 1/3 scale to scale almost everything down to size. Of course there are some aspects which could not be scaled, ie, ball, ball weight, but the right size ball, 13" in diameter, has been chosen so that it would extend beyond the chassis.
the true link is,
http://prhsrobotics.com/team/content/view/33/49/ , Here you will find rules and sign up information.