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For those of you without metric intuition, 80mm is about π inches. For those of you without metric intuition who flunked geometry, it’s about 3.14 inches. Which am big. Like, cannonball-sized.

And yes, it’s Jörg Sprave again, who many of you will recognize as the mad slingshot genius who brought us machete- and circular-saw-blade-flinging incarnations of his weapon of choice earlier in the year. We who are about to click salute you, Jörg. [via Hack a Day]

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.


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