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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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On my model, the oil cap has a SHCS in it and there is a nut in the valve cover. It spins on, just not the way a real oil cap does. I'm not a fan of printed threads.