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.
There is a animation about the pneumatic Wankel concept: https://www.youtube.com/watch?v=zuZy_eAnwXo
The hardest part would be to properly seal off the top and bottom gaps. A 0.1 mm high, 30 mm long gap is already a highway for air molecules. Putting a large rubber seal around the entire perimeter would cause too much friction, I am afraid. Food for thought...