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.
I'm in the middle of making one of these. It's going well so far. What is the size of the nut that is fitting into those slots on the pen holder. I don't seem to have any that fit lying around. Thanks!