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.
You're very welcome :D
However, reading through my comment, it wasn't very well-phrased. You obviously still need to turn supports to "Touching buildplate" otherwise it'll just generate trees inside :p But the trees will support every external thing of the duct :D