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.
And BTW, the github source of these STL's are completely different and it makes it very difficult to determine what is the "single source of truth" or latest version with all JJRobots projects all over the web. And yes, the Electronics Shelf on github is different (older?) and also doesn't render in Cura or Slic3r.