Hardware license

You've currently chosen to put the GPLv3 license on the project. The GPL is suitable for software, but less so for hardware. In addition please consider how using the GPL essentially complicates any commerical use of your creation. While this indeed keeps your project out of the hands of commercial companies who could run away with the idea it also blocks anyone from creating a proper product based on your work.

What's your end goal for the project? Creating a commercial success for yourself or creating an open VR headset that's made available commercially by several companies?

Anyhow please consider using a permissive license like MIT or BSD for the software and a truely OSHW license like the CERN–OHL-P.