Hi, Gary, Did it have the two-piece brass hammer flanges originally? I just measured an old sample from a 121 ¼g: 6.80mm centerpin to bottom of flange 15.25mm centerpin to center of roller slot 10.55mm roller height guess So the roller radius would be 18.55mm. I think I remender these not corresponding with what's available from the catalogs. If this is something you're inclined to change, Pianotek displayed a little mototool fixture for slotting shanks (I don't know if they're selling it), otherwise the carbide blade for the Microlux table saw works pretty well. Clark
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