Quoted from Moeman65:
just recently on my Aerosmith Pro during multi-ball it has giving me an extra ball or two as the balls drained and the light was blinking between the flippers. Most of the time if 2 drain or so it will return the correct amount. Sometimes it will return too many. Any thought as to this problem?
Aerosmith has a couple things that could cause what seems like odd behavior. First (and this bugs me), when extra ball is lit Jacky says “shoot the scoop to add a ball”. When it isn’t an add a ball, it’s an extra ball. Second, the actual add a ball is from the mystery. And finally (and this I like), there are short ball savers for some shots. In a multi ball these can feel a bit random, but they aren’t. When draining other balls out of a multi ball, a scoop shot with the last ball may bring them and one more back to the player. The VIP pass in the right outlane can bring back two balls if it’s triggered and timed with a second drain.
So with all that, I’m thinking either the add a ball at the scoop, or the ball saver out of the elevator, or the ball saver off the ball lock hitting Jacky in the face. It might feel random, but there was a cause, and it doesn’t sound like a problem in your game. Just play another hundred games and you will probably spot what triggered it. Also, you can make it less likely by going into the settings and shutting off the short ballsavers from the elevator and other shots.