Comment by WarmWash

Keeping the build trend going:

Communication that detects the release and travels as close as possible to the speed of the natural signal in the rope, and is robust enough to recover without losing stability if the other team grabs the rope again while your "let go" signal is mid-flight.

One way to dampen this is to put a really strong guy on each side, with instructions to never let go of the rope. These are the flywheels of the grid.