This is @ 90 degrees from Neck Servo - the rothead (rotation head) servo seems to be good. The Eye's heh .. do some pretty fun stuff :D
And the MRL Script which does it .. Notice there is not much Blender complexity ! Just add an Arduino - all the virtual serial ports, tcp/ip, communication and initialization is done Automagically !
[[home/GroG/InMoovHead.py]]
Practice on analoge rig
BTW :- Great video and fitting sound track ....I can see why that headbanging inmoov dislodged his eye.....