Asked
— Edited
How many Ez-b4's do you think it would take to control this spider? this is nice I wish I could have seen it in person.. 
Sound Servo (EZB)
— Map EZ-B audio volume to servos; multi-servo mirroring, scalar range control, invert/min-max, waveform feedback to sync mouth motion.
Try it →
Very cool. Looks like all Hydraulics and is build and operated like a backhoe. I see the "driver" operating leavers near the head.