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Response to Jay Lundy:
"I'm kinda surprised that arms made of PVC can withstand that much torque since the lever arm is so long."
There are a few pictures in the gallery that might help answer some of your questions. I know a good reason why their wings do not need to be very strong. When they grab 3 goals their wings swing back in to the body of their robot and I believe they latch so they don't swing around everywhere. Once they have 3 goals it is very hard to break their wing because it is now part of the body of the robot.
I hope I was able to answer one of your questions but it is much easier if you are able to get a hold of some of their pics.
Aman
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