Earlier quoted context omitted.
Those bumpers you refer to are the posts at the entrances to the outlanes, which are the channels at the far left and right away from the flippers, where you can lose a ball. Those posts are now almost universally adjustable, for a wider gap to drain more balls or narrow to keep them in play longer.
There's a few games with a (computer controlled) block for the center drain too. But mostly, early drains have been addressed by kick-back and ball saver. I don't know exactly when ball-saver came around; my Bride of Pinbot (1991) doesn't have it, although it does light an extra ball for free on your last ball if you ran through your first several balls (defaults for three ball play, but configurable) too fast (confi…
Re: The Economics of Pinball (2009)
#31Bride of Pinbot is a sadistically difficult game.