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Re: What types of metal do you use for your robot in general?
Our team typically makes most of our robot out of 1"x1" and 1"x2" square aluminum tubing. We also use lots of 90 degree 1"x1" angle and 1" by 1/8" bar. Everything is 1/8" thick. I find that if you go much thinner than it is really easy to over tighten things.
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