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.
The type with the large knurls? The ones I used were available on Amazon but it does not look like they are anymore... I just purchased 1000 of these even smaller M3's, I'm going use those for my designs from now on.