<html> <body> Roger beat me to the punch about the rim. :-) I once had this kind of problem with a Bose in a private home. I tried everything I could think of, to no avail. Everytime I went to tune it, it needed at least a partial pitch raise. Since I knew the house had one, I finally asked how long it had been since the climate control system had been checked. He said quite a while, so I recommended he have that done. He did. It wasn't working. Was repaired. No more tuning problems! I found out about the rim later when talking to Roger W. @ Bose/Kimball. Avery At 10:25 PM 3/14/2005, you wrote: <blockquote type=cite class=cite cite="">At 09:28 PM 3/14/2005, you wrote: <blockquote type=cite class=cite cite=""> Those pianos are just very sensitive to changes in humidity.  I’m not sure why but I think it has to do with the type of rim construction.  I vote for a full system (and more frequent tunings, of course).   David Love davidlovepianos@comcast.net </blockquote> Hi David,                   This piano has a Spruce rim.   The soft wood is way more sensitive to humidity changes.   So perfectly normal.  Yes you are correct in your advice.   Full Damp Chaser System with bottom cover,  More tunings. Regards Roger </blockquote></body> </html>