>>13323848For natural movement you're going to want "opposed" muscle groups and a degree of "give". We were thinking pneumatic air bladder or even hyudralic transformers for larger muscle groups. Solenoid/railgun type for medium and nitrile fiber/contractile materials for fine motor control. Pulley systems aren't ruled out for power transference, I was thinking something like a serpentine or herringbone chain coated in lubricant.