Realize that this is a prototype, but it seems like the center of mass is pretty far back - given the motors/electronics/etc are mounted behind the axis between the rear wheels. Is there something under the rear of the robot to ensure it doesn't tip back? Also, is the rear of the frame indicative of the shape the competition robot will have (thinking of bumper rules and external corners).
I like the simplicity of the straight up and in ball feed path. Nice job of prototyping. Seems like I've seen a lot of wood on prototypes this year - including our own.
