The Optimus 3 hand has no motors inside it. All 25 actuators sit in the forearm. They pull cables that route through tendon sheaths down to the fingers, the same mechanical pattern your arm uses. When Optimus grabs something, the motors doing the work are 15 centimeters away from the fingers doing the gripping. This is what "biomimetic" actually means, and it's the reason the hand works. A motor inside a knuckle has to be small. Small motors produce small torque. You can cram 12 motors into…