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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These are great! I ended up just using a normal 4mm nut. All the added hardware on my printer made it impossible to level bed as I ran out of spring compression. I ended taking all the hardware off and just using the 4mm nut and a washer. It works beautifully without having the screw spin.