CF is the model letter of the 9-ft. concert grand, for which they originally developed the tool, although it will work on any keys. "Rollers" is a factory term for knuckles, like "fly" instead of 'jack.'<br> --David Nereson, RPT<br><br><div class="gmail_quote">On Thu, Nov 15, 2012 at 12:36 PM, William Monroe <span dir="ltr"><<a href="mailto:bill@a440piano.net" target="_blank">bill@a440piano.net</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">Paul,<div><br></div><div>The CF tool is a double ended tool with a large wooden barrel/handle in the middle. One end is for easing front rail bushings (a brass, tapered wedge) and the other end is for easing the balance rail hole from the top (another, much smaller, brass tapered wedge).</div> <div><br></div><div>William R. Monroe</div><div><br></div></div><div><br><div><br><div class="gmail_quote"><div class="im">On Thu, Nov 15, 2012 at 1:04 PM, Paul Mulik <span dir="ltr"><<a href="mailto:paulmulik@yahoo.com" target="_blank">paulmulik@yahoo.com</a>></span> wrote:<br> </div><div><div class="h5"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I've been reviewing Yamaha's Little Red Schoolhouse material and I've noticed they sometimes use non-standard terms, for example, calling knuckles "rollers." One that has me stumped is their reference to a "CF tool." What is that?<br> <span><font color="#888888"><br> Paul Mulik<br> Sent from my U.S. Cellular BlackBerry® smartphone</font></span></blockquote></div></div></div><br><br clear="all"><div><br></div> </div></div> </blockquote></div><br>