<html> <blockquote type=cite cite><br> Jon Page<br> <br> PS  I_always_check that relationship before bedding the frame now.</blockquote><br> Hi Jon,<br>            Funny how experience is a great teacher. I've been caught a couple of times on this one. Just a slow learner I guess.  <G><br> Before the sand paper comes out, I have a little key bed check list.<br> 1. Lever clearance.<br> 2. Spring condition and security. Also smooth action sides.<br> 3. Bass stop block and hammer position.<br> 4. Dag/frame wear. Use a few layers of masking tape on the top of the frame to check this.<br> If the graphite on the frame is worn through or not worn at all, this will be a clue<br> 5. Keybed/frame cleanliness. Once had a paper clip half imbedded into the rear rail of a Yamaha that gave me some grief.<br> 6. Check the bed for straightness with a 48" straight edge.This can yield some clues for what you have to deal with.<br> 7. Check that no frame/action stack screws are protruding. <br> 8. Finally, back out all glide bolts before starting. Suprising how many pianos clean up the front and back rail when doing this. And then I usually find a tapered key height.<br>   You can be caught out very easily with key frames, the 'knock or bow' is not always the cause of the problem, just the symptom.<br> <br> Moral of the story:  Look before you leap.<br> <br> <br> Roger<br> <div>Roger Jolly</div> <div>Saskatoon, Canada.</div> <div>306-665-0213</div> Fax 652-0505 </html>