Energy use seemed like a significant issue - how many flywheel spinups do you get out of a battery?
They could include a charging circuit that routes power through the assembled blocks. Each unit would still require it's own independent power for disconnected motion, but they could recharge when connected.
They could include a charging circuit that routes power through the assembled blocks. Each unit would still require it's own independent power for disconnected motion, but they could recharge when connected.