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Re: We're trying to lose weight...
We like to use #8 and #10 hardware for holding things onto the robot, 1/4" for things that need be held on really well. This year we have some 3/8" and 1/2" bolts because it's the easy way to support a roller with a bearing at each end...no shaft required.
We use a lot of 5/32" rivets, they're a lot stronger than 1/8" and don't weigh much more.
Plywood is a wonderful material for robots, but you have to think differently.
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