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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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How tight are the screws? The fan shroud (for the heat sync fan) is not my design. I provide a link to it for convenience. If you tighten them too much then the fan can be noisy. Also the quality of the fan makes a difference. The OEM fan is very cheap. I recommend that you get sealed bearing fans.