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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.