And also don't forget to give yourself around 5-10 pounds of weight when you ship it off because you can always add more weight for traction during the competition but it is a pain to try to get off even 3-4 pounds at the competition. Also take into account the width of the nuts and bolts, because if you make your robot exactly 30x36, your nuts/bolts/screws or whatever will make it 30.5" x 36.5", which means you can't compete
