Quoted from frenchmarky:
Surprised somebody hasn't made a game which actually serves two balls to the shooter every time, or after you shoot it shoots a second ball out automatically from a subway kicker or something. Just give the player multiball at the start and see what he can do with it. First ball drains and then it just reverts to one ball scoring.
Look into gottlieb spring break. It is the oprah of multiball.
3 ball game.
Dipswitch 31 ON starts the game with
3 balls per game: 2 balls on ball 1, 3 balls on ball 2 and 4 balls on ball
On a 5 ball game: 2 balls on ball 1, 2 balls on ball 2, 3 balls on ball 3, 3
balls on ball 4, 4 balls on ball 5.
Dipswitch 31 OFF releases all 4 balls on the first ball in play only.
1 ball is released on every subsequent balls.
In the game you can shoot the 1, 2 and 3 targets to light "release a ball".
Which alternates on 3 rollovers, and one being "release all balls".