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 just built one with PLA. Since other sources recommend PET-G or ABS, so I would think that these are to spec since I've never read anything about changing the tolerances. Join and ask the FB group and ask your question for more feedback.