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The red tread on the tire is simply the timing belt given out by FIRST. As for the cups, a small scratch in the HDPE should not really matter. We even tested this on a surface of our HDPE which was scratched, and it did not effect it at all. The way the cups are designed, the pressure which is generated is spread out evenly over the base of the cup, for more surface area. We locked them down, created a vacuum, and had half our team try to push it horizontally from side to side and front to back, and it would not budge.
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