I stumbled across this video of an old man who used to design airplanes then later in his life designed an ergonomic chair that took him 9 years to dream up. His idea was that it shouldn't have buttons and levers yet have everything be adjustable.

The headrest pivoted to adjust to however far you were tilted back and overall was pretty neat.

I was just complaining to my buddy how expensive computer chairs are and that made me curious as to how much HIS chair was but apparently my google fu has weakened.