Zheng3 Penny Ballista

This nefarious device can easily launch a U.S. penny across a room when printed at 1:1 scale. It's the first upgrade many Seej players seek when they need a little more oomph than the Zheng3 Penny Catapult can provide. Seej is an open-sourc...

Tags: 3d makerbot seej toy zheng3

Link: http://www.thingiverse.com/thing:23464

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