I get the impression here that a staple is a staple is a staple, but they aren't all the same. I just cut up a few old hammers left over from sets past, and found a few significant variations on the theme. One is a wire loop, inserted from the bottom, clear through felt and molding, and twisted together on the top. One is a long T staple inserted from the bottom, through felt and molding, and spread apart at the top like a cotter pin installation. A couple more are staples, driven or inserted through the felt and into, but not through the molding. The last one has staples that don't even reach the molding, and in fact don't even reach the underfelt. It seems pretty clear to me that these different staples will have somewhat different properties as reinforcement fasteners of a felt to wood glue joint, and that not differentiating between them makes most of the discussion somewhat less than informative. So clarify please, and qualify observations and speculation with a more accurate description of what you're talking about. Those that did, please disregard. Ron N
This PTG archive page provided courtesy of Moy Piano Service, LLC