<html> Avery- So what happened? David Skolnik At 12:44 PM 02/03/2002 -0600, you wrote: <blockquote type=cite class=cite cite>List, Warning. This may be a fairly long post. Here's the background. Our newer 'D' (1997) went back to the dealership for some work. The extremely high humidity after the flood last summer had affected some things, mainly the damper system. I had thought about completely re-regulating it this summer but because the music desk was so tight it almost took Godzilla to get it out, I decided to wait and see if things would return to some semblance of normal after it started drying out. They mostly did, including the music desk problem. It's fine now. Anyway, the dealer had heard about us having some problems with the piano, so he offered to bring it in and have his techs do some work on it before the festival at no charge to us. Hey, why not? :-) Freed me up to do other things. I've talked to the shop tech and he told me that he'd had to raise the stack some because the hammers weren't hitting correctly. My first question is what effect would that have to how the action would then have to be regulated? OK, now the problems. I had to pull the action Saturday to do something or other and accidently discovered that a lot of the hammers are now resting on the backchecks. Even to the point of being able to hear a noise when they hit and there's no bounce at all on many of them. Especially from the upper middle, all the way down to the end. Also, if you put your hand on the hammer and slowly press the key, you can feel a slight rub on many of them in that area. And no, it's not the tail that's rubbing. :-) If the hammer should happen to come back too hard, it could cause it to be caught by the backcheck. That happened on one note with Angela Chang (Janina Fialkowska's substitute). I corrected a few by changing the angle of the backcheck just a little and got through the concert OK. I checked a few things and found that the dip is well over 10mm on the whites, the hammer blow is at least 2", the drop is way too much and there is plenty of aftertouch, in not too much in some cases. However the basic feel is fairly decent, maybe even on the light side. Almost "dangerously light", as Anton put it. If I raise the hammer line to where I normally like to have it (around 1 3/4" or so, that's going to seriously increase the aftertouch. Even raising it to 1 7/8" would cause a problem and I don't think I can decrease the dip enough to compensate for that. There's also not enough room to be able to lower the whites any. They're already about as low as they can be. That brings me back to my first question. Would raising the stack have made these compromises necessary? Especially the excessive hammer blow? Any suggestions on what to do to correct the problem(s). I haven't had a chance yet to check the backcheck height in relation to letoff. That's one possibility but I'm not quite ready to jump in and start lowering backchecks just yet, until I know what's really happening here. The problem was not there before the tech raised the stack. Got any comments Horace? Anyone else? I'm going to have to get on it this week, so any quick help would be greatly appreciated. Sorry about the length of this. It just takes a bit to explain all this. I'm also going to send this to the caut list, so sorry about any duplication for some of you. Regards, Avery P.S. At least they corrected some of the problems with the damper lift, even though I don't really like the damping, either.</blockquote></html>