dual rotating axis 3D printer design

I'm new to 3D printing and I'm very impressed with the community here at Thingiverse, so I want to give something back.

While I don't have any nice 3D work to share, as an engineer I tried to imagine an alternative 3D printer design, and I came up with this one.

This is my basic design for a mostly printable 3D printer.

To be honest I didn't do an extensive search to see if similar designs exist, but nonetheless I release this idea to the public.

It consist of two main rotating bodies, one that is the “dish” print surface (A) and the “arm” (B). The arm harbors the “hand” (C) which can move up/down (Z axis). The intermeshing of the rotating bodies provide the two degrees of freedom required for the X and Y components.

The strengths of the design are:
1) simple to assemble and robust
2) It can be almost completely 3d printed
3) Multiple arms can be added (up to four in total) and combined with additional dishes and heads to allow simultaneous build of up to 4 identical