Quoted from Jnyvio:
That POP bumper is adjusted super sensitive any tighter will close the circuit.
If I am reading you correctly, you are thinking about it backwards.
I like things tight, set to tight tolerances, etc. If the manuals say gap the switches at 1/16" I go for 1/32". For me it works for rollovers and outlane switches. I found out by accident that this practice does not work for pop bumpers.
If you make your pop switch gaps ultra tight here is what happens. The ball with hit the skirt and the tight switch will kick the ball before it gets all the way inside the space between the skirt and pop ring and you wind up with a weak rebound.
I'm not going to sit here and say this is the proper way to gap a pop switch, but this way works for me: You don't want those pop switches closing until the ball is all the way inside that air space between the ring and skirt. You push your finger down on that skirt and adjust the switch so the contacts do not touch until the pointer on the skirt is all the way to the edge of the pop spoon. This lets the ball get itself all the way inside that air gap and when that ring touches the ball it will be happening from the inside edge of the ring and ball-to-ring contact will be the full width of the ring instead of the ball just hitting the outside edge of the ring.
Try it. I think you will appreciate the performance difference.