Paradise, NV
If you're using LED's in the bumpers remove the sockets completely, tack solder wires to a 44/47 or 555 LED and run the wires through the bumper body & playfield and solder them to the PF wiring. Leave some slack but remember that since they are LED's, they shouldn't burn out in theory for many, many years.
Maybe place a glob of Silastic etc. in the bumper cavity to hold the LED in place.
Then, when you sell the machine, look here for a whiny "Hack of the week" crybaby thread about this dependable way to solve your bumper socket issue.
