I played a Surf Champ that Keith Elwin did this to and it was a much better game. I’ve tried to jumper a few things on my own to no avail. I’d be interested!

Just jumper the respective pins to the 3 Ball play socket and try some variations.

You have to inspect what changes between the settings. Sometime a feature is added, sometimes a feature is removed, and sometimes it stays the same. See what gives you the balance you are looking for.

And I agree, sometimes 3 ball play overcompensates.

But for one example, Quick Draw/Fast Draw, 3 ball play is best/perfect.

(1) Set the game to 5-ball play.

(2) Start a game.

(3) Play until the third ball. Take the ball out of the shooter lane and put it in your pocket.

(4) Look at the ball count unit in the lightbox. Look at the lower set of rivets. Find the rivet that is being touched by the spring-loaded finger. You want to learn the color of wire that is connected to it. You will have to look at the back of the unit. Use a pocket mirror or the service position to observe it.

(5) Find the same color of wire on the 3-ball side of the settings jones plug.

(6) Use a jumper cable to connect it to its corresponding slot on the 5-ball side. Because they are adjacent, you could also bridge them with a paperclip.

(7) Take the ball out of your pocket and drain it. The game should end.

I agree with @leckmeck. If you put the game in 5 ball mode and short the yellow-blue wire to the white-green wire at the balls per game adjustment, the Ball Count unit should take extra steps when you drain ball three to get to the game over position (ball 6).
Jacks Open 5 ball rules with 3 ball play (resized).jpg
/Mark

This is awesome info! I tried playing 4 Square on 3 ball but the settings are terrible. I may try this technique soon.