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.
The f3d is the source file. You need to upload it to the Fusion servers before you can view/work on it.
You can step through the history at the bottom to see how it was put together. I followed your general construction from Antimony (mostly), which is not the natural way to do it in Fusion, but I wanted to be sure to get a similar result.