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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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Hi all, here's the three cylinder version. It runs very smooth.
https://www.youtube.com/watch?v=D0vf5jiBnRQ

https://www.thingiverse.com/thing:2975275

Compressed Air Engine Three Cylinder