Taking apart a new-to-me 686 NO DASH for cleaning and polishing, I'm noticing that the three side plate screws were buggered up by whoever had the gun before me, and that the three screws are each different - is this the way it's supposed to be with a 686? I ask because my Model 64 had two side plate screws the same, and the one that held in the crane assembly was different. What about the 686 side plate screws? And can anyone point me to a good source for quality S&W revolver parts? Thanks in advance for any help !!!