Hmmm. Looks a lot like
this one. Impractical for conventional machining techniques. Great for 3D printing. Mine has the spokes arranged more in the classic spoked wheel pattern, which relies on spokes in tension for torsional rigidity. The design in the OP relies strictly on the bending stiffness of the spokes for torsional strength.
Note that
this one has the same internal structure, but adds fairings that protect the spokes.
So, all you folks with 3D printers, print some up, test them out, and let us know the results.