Hi Roger, Would this method also work on a Yamaha back rail? I have a similar problem on a C3 - the ends are well-bedded, but the area in the middle is rather uncooperative. There aren't any kerfs, save the cut-out for the una corda lever. Respectfully, Jon >Hi Victor, > A healthy saw kerf half way through the rail, at >the top of the crown, of the warp.Two kerfs, from the underside >about 6" on either side of the crown kerf. Shim the lower kerfs to >straighten the frame. Then bed the frame in the traditional manner. >Warped frames have a nasty way of moving with humidity changes, the >high side saw kerks, helps to stop any warping upward movement if >they are left open. >Regards Roger > > >At 07:41 AM 2/11/02 -0500, you wrote: > >Heelo all, > > > >I need your help in deciding what to do with a Howard #550 (Kawai) Ser# > >2905365. > >They key frame is warped upwards at the center of the front rail. I am not > >sure if the balance area or the back part of the4 frame is also warped. Did > >not get the chance to look at it; and could not really figure out how to do > >it in a small apartment. > > > >What is the best remedy. > > > >Thanks > > > >Regards. > > > >Victor Belanger > >Somerville, MA > > Jon Ralinovsky Piano Technician Department of Music Miami University 513/529-6548
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