Case for Pong Clock

I built one of these:
http://www.instructables.com/id/Pong-Word-Clock/
and then I needed a case to put it in. I had just got my 3D printer, so this is my first project designed from scratch. The design includes cutouts and standoffs for the LED panels and also standoffs for the Freetronics Eleven Arduino compatible board that I used for the project. I believe that any Arduino Uno compatible board will also fit the standoff pattern.
You can edit the design using a DXF file editor and Ope