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.
I would adore to see such a thing. In concept, it's not even difficult, just a matter of keeping your tolerances tight without being so tight they can't be 3D printed. A Wankel, in a lot of ways, is basically just a vane motor, so I can't imagine it'd be much harder than that. Hell, I'd be willing to bet you could just modify one of the existing Wankel models out here on the 'Verse for a super basic proof of concept.
I might just give this a shot when I have more time on my hands. You could probably do it better, though, if your work on this motor is any testament to your ability. A very impressive piece.