I did not know you could restart a game buy holding down the start button. I will try that on my ST tomorrow. It's tempting to restart a bad 1st ball but seems like I always have a bad ball in a game. Sometimes you start strong then choke and other times you end strong.
By accident, I did discover that holding the left flipper down and then hitting start puts the game in competition mode. I don't have a use for that mode but thought that was a cool feature.