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.
That part seems to be the one people have issues with when they have print problems. It's a complex part, I suppose. Looks like on yours, the stator supports aren't getting printed consistently. Some are missing, possibly because the slicer thinks they're too thin. Does the print preview show all the supports?