I don't want to detract from your topic. I occasionally have an issue (maybe around 1% of the games) with the extra ball too. Sometimes when I'm due an extra ball, I do not get the extra ball. The flippers still work and the players score increments by 1000 points about every second. At this point I turn off the machine and just start over. Wondering if this is a software or hardware issue? Do I have the options set incorrectly?
The changes I made from factory settings are:
Ad 02 1,500,000
Ad 06 Ball
Ad 07 Ball
Ad 11 5
Ad 22 10,000
Ad 23 Yes
Ad 50 No