<html> <body> Susan - In my experience, the noise tended to come as much from the coil hitting the sides of the top flange as anything coming from the post.  In any case, from an expedient perspective, and perhaps admitting to some technically pernicious behavior, I found it simple to eliminate by removing the top arm of the butterfly spring and bending it laterally, away from the rep lever (opposite direction to the existing lean of the coil), then reinstalling it.  As long as the displacement wasn't too severe, to where the spring force would be distorting the travel of the rep lever, or causing uneven were in the spring groove, the tilt that this bend creates in the coil captures it within the fork of the vertical flange, allowing no side to side play, or noise.  The only other caution is to make sure that the lower arm is not induced to contact the jack spoon. What could be easier? 0!0 David Skolnik Hastings on Hudson, NY At 12:14 PM 5/23/2012, you wrote: <blockquote type=cite class=cite cite="">Yes, unfortunately that is original. They changed over to the plastic/delrin/whatever a few years ago. The first I knew of it was trying to get a click out of a repetition in a rental D. I chased it down to the coil whacking against that post. I believe I heard the suggestion from a Steinway person to twist the coil of the spring to get rid of this, Personally, I prefer the old system, which if I remember right was bushing cloth with a center pin through it. Damper cord would probably work -- it certainly has held in plenty of springs in other actions. It seems to me that people designing pianos have a fond illusion that just because teflon is low friction, it's also quiet. But it does not absorb or deaden sound at all, nothing like the action cloth or bushing cloth it replaces. (Think of all the tiny little squeaks from spinet and console damper springs when they stopped putting in the cloth lining at the end of the lever and just sprayed on green teflon.) Since the noises which get going with it take awhile to show up, presumably the designers continue to think that teflon is noise-free. Susan On 5/23/2012 2:29 AM, David Boyce wrote: <blockquote type=cite class=cite cite="">Wow, if that's some kind of thin pllastic rod, surely it can't be original?  Surely too there is some risk of noise arising from the working of the spring coils against the relatively hard surface of the plastic?  What should be in there is Flange Cord, the correct material.  It's a special material with a braided sheath covering a bundle of threads inside.  I will try and send a pic shortly. Best regards, David. <a href="http://www.davidboyce.co.uk">www.davidboyce.co.uk</a> <blockquote type=cite class=cite cite="">Thanks Wim, Here is the pic for the plastic cord.</blockquote></blockquote></blockquote></body> </html>