<HTML>Esteemed list= scholars and such, I don't know how many of you remember  the case of the corroding st= rings on a brand new Kawai Rx-3 I encountered in January of this year. &nbsp= ;I followed up by strongly suggesting that they stop mopping the radiant con= crete floor with a vinegar-water solution(acid steam beath), which they did.=  I thouroughly cleaned the strings, tuned the piano a couple of times,= and went back a week ago, and voila--no more corrosion!  Not only that= , the bloody thing was so close to being in tune I almost felt badly taking = the money--well, not really... #2.  I've been tuning a Steinway M that has new strings, hammers, p= ins, block, wips, but I'm not sure about the board.   She's a very= good customer, gets her piano tuned every 6 months like clockwork.  I = first tuned the piano 2 years ago, and today was my fourth trip out.  F= irst time, it was 10-15 cents flat.  Second time, it was 10 cents or so= sharp, third time, 10 cents flat; today 5-10 cents sharp.  I do know h= ow to stabilize a piano, so this was a mystery to me.  At least until I= heard the air conditioner go on.   It's been hot in these parts lately, and pianos are going flat in droves= (the houses in this part of CA are built for earthquakes, not inclement weat= her), but in the case of this piano, it's in a very large luxury home, with = all the amenities.  Unfortunately, the piano is directly under a duct t= hat dumps cold, moist air directly on it.  I'm convinced that is what's= going on here.  In the winter, the heat comes out of the same duct, bu= t to slightly less effect, since the heat rises.  The duct is now perma= nently closed.  More details next time. Any comments or thoughts on this one?  Just thought it was kind of = interesting.   Dave Stahl </HTML>