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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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If you haven't figured it out yet - you actually have to assemble the iris counterclockwise; once you get to the a point where it seems like you cant layer it on top any more, you actually have to place the iris parts under the previously placed iris parts.