<HTML>In a message dated 2/18/03 8:11:23 AM Central Standard= Time, Tvak@aol.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">This time in addition to the tu= ning going south, there are a lot of double striking hammers.  This is not going away.  Something changed and = stayed changed.  I tune it next week and I need to remedy this, but I'm wonder= ing, what changed?  Not being as proficient at grand regulation as I am in <= BR> vertical, can anyone steer me in the right direction?  Looking through = the strings while I play, it looks like some of the hammers are not letting off.=   (This certainly could create double strikes.)  The piano was out of <BR= > regulation before the flood, but I don't know if that was happening before, = therefore I don't know if that's causing the problem this time.  I don'= t have the time (nor will they pay for) a complete regulation of the piano. &n= bsp; I could move the backchecks forward, but can anyone suggest a scenario that <B= R> would result in double striking of hammers from exposure to high humidity?&n= bsp; I mean, why would the backchecks move or change? Just fishing... Tom S </BLOCKQUOTE> I think that perhaps the keybed expanded with the high humidity. This caused= the balance rail to move up, etc. etc. Without doing a complete job, try lo= wering the glide bolts. This might solve the problem. Wim </HTML>