Seeing those banks of enormous capacitors, I'd say simple solenoids. Pneumatic is one approach. Simple and inexpensive but with a lack of control over actuatio

Seeing those banks of enormous capacitors, I'd say simple solenoids. Pneumatic is one approach. Simple and inexpensive but with a lack of control over actuation speed. It would be expensive, but linear actuators would give incredible speed and precise control over position and velocity.