MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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Made it and it broke immediately. I was using PLA. Maybe it needs a different material.
Also, The base of the catapult gets just connected to the base enough to make it stick and break. It might be better redesigned as a multiple piece project, perhaps. Good idea though