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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oh the one piece version is for the V2 magwell not the original one i would not suggest print any of the v2 pieces they have not been tested or printed either. The one for the original one is three pieces. There are warnings about the v2 parts at the bottom of the post.