Quoted from OnTheSnap:The left out lane ball save often misses on timing and the ball drains.
The consensus is that the switch arm location/shape is causing the issue...I think it is too far forward in it's activation.
The switch was activating the kickback too soon in its standard location unless the ball was moving fast. If it was moving slowly, the kicker was most of the way thru it's travel when it hit the ball. Thus the kick back was very weak on many balls.
The issue was corrected somewhat by modifying the switch arm. I replaced the switch arm with one of a different shape now it works a bit better. I can't remember what the P/N of the metal arm is. I'll see if I can figure this out and repost.
Robert