Thanks for the help. I got the bushings out. They are simply 5/15 x 32 threaded steel with a .134 through-hole and a counterbore of .208 diameter, .050 deep. And the screwdriver slots on the faces, of course. All measurements are approximate because of surface irregularities. My pins have .132 strikers x .236 (vice .297 print), .204x.112 collars, and .161x.476 "B" dimension. I see clear evidence of grind-down on the pins and the rear surface where the hammer lands. The right pin that works protrudes about .078 from the surface of the bushing, the left one that doesn't work protrudes about .060. So I don't know if need medium or large pins, and the eBay bushings are clearly not what I need. Unless large pins were for 8-gauges, I would guess I need large pins. Thanks again for your help.