I have been going through my herd setting the games to maximum # of balls and also the high-score levels (when I can get the paperwork). I like to set the levels at or just a little lower than the recommended levels (a common method looks for something in the middle of the recommendations for 3- & 5-ball).
But I don't have anything for Bally Rocket III & Dixieland. I have a bunch of cards for one of them (I'm unsure from which), but I have no idea what a good setting is.