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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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Well took me like 10mins in modo to modify the idler to have the bearing post 3mm closer to the mk8 gear and added some additional material around it for strength, seems to work well, assembles nicely at least, haven't tried it yet properly.