My game is a bit over a year old and the left flipper started occasionally sticking in the up position. Opened it up tonight to find brass dust under the flipper mechs and the coil stops torn up. The slug that the plunger hits is completely loose on both left and right flippers. There is no more copper or brass washer left between the slug and the metal of the bracket. That is why the flipper is sticking because the magnetic path is no longer broken by the washer.
This is after a few thousand total games so I have to think those stops were not made very well. I don't have any replacement Stern parts on hand but I do have some new Williams coil stops and they look very close. Does anyone know if they Williams coil stops will work in a Stern game? If not, what is the problem they would cause?