On my Lethal Weapon 3, been having an issue with out hole #3. When shooting the ball into that hole, usually it will bounce back out on to the playfield. Sometimes it will bounce out of the hole to the left exit into the bumpers.

I've lowered coil power to low, just to see if the flippers were too strong and made sure the playfield is pitched at 6.5 degrees. I also placed a piece of window weather stripping on the back plate behind the hole to see if that would cushion the ball's impact. Didn't seem to do much, although maybe a few less bounce outs. I did this to hole #1 also because that would sometimes get some bounce outs and I haven't gotten a single one since putting the insulation there.

Anyone know if there was supposed to be any material on those metal plates behind out hole 1 and 3? I can see a black square mark on the plate, like something used to be there.

Any suggestions?

To answer my own question, it's called drop dead foam.

http://www.pinbits.com/index.php?main_page=product_info&products_id=131

Took a while to find the correct keywords when searching.