If they can figure out how to wirelessly power the cubes, or allow connected cubes to power each other via conductivity (perhaps at the cube edges), then the se

If they can figure out how to wirelessly power the cubes, or allow connected cubes to power each other via conductivity (perhaps at the cube edges), then the self-assembly of the bridge at the scale they're aiming for makes much more sense. Hitting on the flywheel as the core mechanism for locomotion was amazing.