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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Awesome! Lookin good. I've always wanted to try a direct extruder, now I have a reason to. ;) A few suggestions on the esthetics. I'd go all the way through with the hex holes. Even-though you'd see the NEMA there, it would still make it look a little better with the full cutout. Also, rounded corners would help with continuity as well. ;)