<html> <body> William/List, Assuming the angle thing(s) are correct/corrected........ <blockquote type=cite class=cite cite="">I don't like it, but it seems the jack does get bumped out of the way a little bit by the knuckly before checking, but I'm at a loss as to how to solve this.  As I said, the jacks really can't be moved farther forward, and increasing aftertouch does not seem to help.</blockquote> This comment brings to mind something I don't "remember" being addressed. Is the knuckle placement on the new shank the same as the original: i.e. the distance from the center of the flange center pin to the center of the wood core of the knuckle? Also, is the knuckle size noticeably different? Have you tried putting one of the original shanks/hammers back on the rail to see if it will work with the new wippens? Not having enough drop can also sometimes cause hammers not to check on a soft blow. I had some "bobbling" hammer problems several years ago on one of our concert grands and increasing the drop a slight amount solved it. Just some thoughts. Like Dale said, "Frustrating, ain't it?" :-) <blockquote type=cite class=cite cite="">Also, these are new wippens, repinned upon arrival at 5-7g.  Hammer shanks also repinned on arrival.   Thanks again, William R. Monroe</blockquote> Avery </body> </html>