I’ve created an EAGLE library and reference schematic package for those who would like to design their own Cube Carrier board. This package contains production-proven footprints, easy to follow schematic symbols, and a known good schematic for the carrier board to start your design from.
As we discussed by email, the files should open with no issues on EAGLE 7.7. I created them EAGLE 6.6.0 and have not observed any issues with opening them in EAGLE 7 and forward.
The PCB for a carrier should be 4 or more layers to account for proper ground planes.
Also, note that the package covers only schematic and footprints. The package contains a .brd file to keep EAGLE happy, but it’s not setup as a reference layout.