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.
It depends of what 3D-printer, plastic and settings you use. If you are unsure you should use raft and support. All parts are designed to be possible to print with PLA plastic directly onto a suitable print bed surface, without the need of raft or support.
To be on the safe side, use PLA with slow print speeds such as 30 mm/s and make sure that you have a good and effective cooling fan aiming at the 3D-printed object.