Quoted from Richard_BoK:I would take the plunger out of the coil, and place a rubber ring (5/16") on the plunger (near the end), so the plunger has less stroke.
I wouldn't do any electrical modifications for this.
I really like this idea. On my Fathom, when the ball eject saucer in the back kicks out the ball, it usually bounces off a post and right back into the saucer, which ends your multiball and really stinks. I took the rubber off the post it bounces off of, but I like your idea better!