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.
Here's an article for you to read up on. https://www.3dhubs.com/knowledge-base/supports-3d-printing-technology-overview it explains when to use supports. Rule of thumb any horizontal overhang requires support of some kind. My personal work around is to create a slight angle, the printer then can build outwards with no drooping.