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none on our bot.
We were involved in the flipping of another robot(we pushing them down the ramp and they went over) and their teammate hit and broke their light cover. Actually, we got flipped twice, one time the little piece of wood our light was mounted to (flimsy plywood) broke and saved the light, the other time the peice cut out of the big boxes FIRST gave us our kit in used to replace the broken peice of wood bent and saved the light.
We were lucky.
About the ramp, we have one external chain on each side of the robot, and we had cardboard covers to protect it and other robots from it . . .
well, it got hit anyway, and the chain and one sprocket came off the robot. The chain fell through the grateing on the ramp, but the sprocket was too big. We replaced the chain and didn't get the original back until the end of that day.
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