Listener Tim writes in with a note on how the Williams multiplayer games have a superior method for letting the player know they have another ball.
The Same Player Shoots Again lamp does not go off until you score a point on your extra ball. This is completely different behavior to Gottlieb and Bally games, that would turn the lamp off as soon as the ball was served to the shooter lane.
Listen as I try to describe the circuits involved!
Big thank you to Tim for suggesting the topic and bonus points for sending a schematic snippet!