<html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <font face="Arial">I don't know Terry. This type of action, which I have encountered before in a Bechstein, has BOTH the ordinary coil jack springs AND additional spring & loop. Whether it made any actual difference to the efficiency of repetition, I doubt.<br> <br> Best regards,<br> <br> David.<br> </font> <div class="moz-cite-prefix">On 31/10/2012 15:13, <a class="moz-txt-link-abbreviated" href="mailto:pianotech-request@ptg.org">pianotech-request@ptg.org</a> wrote:<br> </div> <blockquote cite="mid:mailman.3613.1351696427.4133.pianotech@ptg.org" type="cite">And what do those springs do? Simply add more spring in the same manner as the more common coil jack spring? <div><br> </div> <div>Terry Farrell</div> </blockquote> <br> </body> </html>