That's just one of the many HMD's that Carmack has played with and hacked on ext...

bryanlarsen on June 6, 2012 | parent | context | favorite | on: John Carmack is making a virtual reality headset

That's just one of the many HMD's that Carmack has played with and hacked on extensively. It's quite clear from the interview that Carmack has done quite a bit of hardware hacking as well as software development.