Hi Elliot Don't get me wrong when I ask if the keyframe is really bowed or not as I seem to get the message that you are not sure. It may well be that some one in the past has adjusted the balance rail to high in the middle and this is causing the front rail to lift in the middle, or the hold down thingees on the key blocks at the ends may not be adjusted down and the balance rail may be too high at the ends. Its hard to tell from your description but I remember back into the distant past were I came across a piano with a similar problem. The answer in that instance was that moths had eaten out all the balance felts and some "piano tuner" decided to just jack up the balance rail to increase the key dip. The key block Thingees were loosened but not enough. The combined result was that this caused the false appearance of what you describe. Check it out before proceeding with the other cures. Check you key dip and felt thicknesses. If the front touch felts have been changed and the balance rail has been lifted to compensate a narrow key dip it could also cause the same problem. Try to find the reason before proceeding with a cure. Regards Tony Caught ICPTG Australia caute@optusnet.com.au > I could not bed the keyframe it either bows in the middle or the ends, I > can't remember which. No small sanding of the frame could help. I am > wondering if this was ever done deliberately by the factory? What could > have caused it to warp? > Have any of you had this type of experience? Aside from sanding, what > is recommended to make the frame more level? > > Thanks, > > Hoping to make more improvements on this next week. > > Eliot >
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