<html> <body> Jurgen, I respectfully disagree! IMO, you get a much more stable regulation with fewer punchings! Take out some of the pinks/blues/greens and put in a thinner type cardboard punching (or two) and then even it out with the others, JMO! Avery Todd At 12:37 PM 2/26/2007, you wrote: <blockquote type=cite class=cite cite="">8 - 10 paper punchings under the front rail felts shouldn't be a problem.  That amount, and up to 12,  corresponds to NY Steinway specs, at least on the recent D I worked on.  Funny, those Youro Peon piano companies - you know: Grotrian, Schimmel and so on - seem to think you shouldn't put more than 4 paper/cardstock punchings under the front rail felts.  I think they are just being cheap.  A real luxury piano has LOTS of paper and cardboard it it.  Too bad the dip is already so shallow on the Hamilton, otherwise a person could add more paper!! Jurgen Goering Piano Forte Supply (250) 754-2440 info@pianofortesupply.com <a href="http://www.pianofortesupply.com"> http://www.pianofortesupply.com</a> On Feb 26, 2007, at 8:08, pianotech-request@ptg.org wrote: <blockquote type=cite class=cite cite=""> <blockquote type=cite class=cite cite=""> ----- Original Message -----   Tuned this new Hamilton grand at dealers just before Christmas. No big deal, not great ,but no real major problems. Went back last week after a prolonged cold snap here in the NE. Key dip was no more than 8mm and regulation was terribly off as you would expect. Looked under fronts and found about an average of 8-10 punchings under each key,also key height is off on several naturals. I'm open to any suggestions besides gasoline and a match to correct. My first thought is to redo height and dip and then regulate,but could this be a key frame problem? Humidity level has not been over 30% in this room. RU/UP</blockquote></blockquote> </blockquote></x-html></blockquote></body> </html>