That "something" also got kind of underdeveloped in the article. It's a crazy system for moving balls aka resources from any machine into any machine. If you

That "something" also got kind of underdeveloped in the article. It's a crazy system for moving balls aka resources from any machine into any machine. If you look closely at it, there's a lot going on :) Each one is made from a bunch of layers of acrylic with channels for the zillions of lights inside, and the solenoids to push out trapped balls, and also inductive sensors to detect if a ball is in there. It would be neat to see this type of exchanger incorporated into other pinball games! Although, given pinball designers' sometimes overly serious nature, it might not happen any time soon...