In order to make the articulation responsiveness realistic as possible needed for over 36 axes of movement, including finger clenching, eyebrow movement and blinking, the mummy hydraulics were being operated at 3000 PSI. Directly managing the manufacture and testing of each custom, precision hydraulic actuator was a serious task. I was handling 2 technicians and half a dozen vendors for hundreds of specialized parts made in 17-4 stainless steel. By the way, if you ever have to debug systems running hydraulic oil at thousands of PSI I recommend you wear coveralls, and maybe a poncho. I definitely donated a pair of pants to that project, though it was certianly worth it. The resulting figure is exceptional to watch. Literally tons of stainless steel "bones" whip around like a trained fighter almost effortlessly, it's futuristically surreal.