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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works great with 1 shell, 20% infill .27mm layers.
However your middle left gear (with the 4 holes) is crap. It needs a washer or something to hold it in place above the top left gear to stay in contact with the largest gear.