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So I started from scratch with a Minkowski sum
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What’s really nice about 3D printing is you can build stuff like this without too much fuss & bother
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The failure seems acutely sensitive to the side strut thickness. Yeah, like that makes any sense.
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Yes, it cures inside the tube and not outside.
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My Shop Assistant … came bounding up the stairs as happy as I’ve ever seen her: the camera worked perfectly again!
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As it turned out, an ordinary lockwasher for a 3/8 inch bolt was just about perfect.
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So, yeah, some of the coupling caps were exceedingly leaky.
