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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if you are using the creality ender 3(new version); use the short version vent ring stl; and just file the bottom in the rear of the v ring where it fits into the mount about 1 to 2 mm. it worked fine for me.