It is not just that rimfires require more of a whack to set them off. Many holster straps are ineffective without the spur for them to wrap around. Eventually hammers with pivoting firing pins will become hard to find. If you wait that long to restore your 617-1's collector value it'll become an expensive hunt. More important, looking at it now must be like looking at a woman with no nose. It's easier to love a pretty face.