<HTML><HTML> ......sorry bout the empty post I didn't put my brain in gear..jb In a message dated 2/5/06 3:58:25 PM, tsimmons4@cfl.rr.com writes: <BLOCKQUOTE CITE STYLE="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; = MARGIN-RIGHT: 0px; PADDING-LEFT: 5px" TYPE="CITE"><<Two weeks aft= er I tuned it I found it over 20 cents flat and had to give it a pitch raise. = A few weeks later it was overly flat again and in need of a pitch raise. I<= BR> explained to the customer about the pinblock to plate flange fit but he said= that he was told by the rebuilder that such a thing was not important. To= top it off he did some research and got conflicting comments.>>= </BLOCKQUOTE> Ted I think mr. farrel has the right idea on this one....the strings probabl= y haven't been stretched or 'aged' enough. Pinblock/flange fit is important = for several reasons but tuning stability is not needfully one of those reaso= ns. For the pinblock to move as much as you indicate vis-a-vis pitch raising= such movement would be obvious, i.e.; pins riding on plate, screws not seat= ed properly, etc. There are fewer more stable pianos than the Yamaha and very little attentio= n is paid to the block/flange fit. But........ they have an excellent tounge and mortise fit to the stretcher a= nd liner blocks. </HTML>