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.
Good point, thanks for the comment! I did mention the size can be changed in Fusion 360, but I've clarified the diameter used in the STL as well now.
As mentioned in the updated description, if you don't want to mess with Fusion 360, leave a comment with the desired diameter and I'll create an STL for it!