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.
Yes, Supports are needed if there is too large of an overhang but that angle does not change as the size goes up.
The only time scaling up can can affect supports is if there is bridging. If this becomes too large, the bridge may fail.