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.
imho that design has a big issue... the external sphere, which needs to be "free to turn", is firmly stuck to the bottom layers, with no brittle parts. If you print hard solid, you will never be able to unstuck it, and this will result either to a "non working thing" or a "broken thing".
This design needs to have holes and bridges to make the external sphere "easy to unstuck"...
the other parts are wonderfull