<html> <body> Hi, Dale, This is very important information.  I've used either Yamaha or Bosendorfer FR punchings for years for precisely the reasons you enumerate here.  The bottom line is that, if the key height and dip are not at least reasonably solid, nothing else in the regulation is going to work properly.  Slow repetition, lack of control throughout the dynamic range...I especially like your term: "lack of focus"...right on target! Thanks for posting these results to the list. Best. Horace At 08:58 PM 1/12/2005, you wrote: <blockquote type=cite class=cite cite=""> List   While putting the final hours on a newly bellied D I did an experiment.    I had installed the usual Thick green punching a while back  prior to receiving the New Oorebeck front rail punching's. So I listened to the sound of F-4 carefully, checked the dip , then changed to the new ones, checked the dip , played the note & the sound suddenly came together with more power and clarity than the first punching. The solidity under my finger was firm and sure.     Thinking it to be an anomally I changed back to the green ones. The Sound diminsihed & lacked focus. Well ,I did this a bout three times on the same note with the same result. I then checked a bass note f-1 with the same effect.    I'd say the new puncing  has a similar beneficial yet cumulative effect much like to mating & hammers to & leveling strings   I placed the green punching between two pieces of thin maple & put a calipers on each side. The compression with modest force would change easily as much as .030. The white new punching only .010.    Considering all this, since the key is where the power is generated  it needs to have a precise stopping moment. If not after touch can change to a depth of .420 even with an initial dip setting of .390 .(which is my preferred dip in Steinways whenever possible.)   Think of the distance in excessive jack travel especially on parts with a narrow window for jack movement & also it's effect on slowing repitition performance. With the white punchings a far more dependable dip /touch can be assured.   Think of the improvement in SOUND Baby!!!!!!!!   I  noticed no change in noise even though this is a pressed felt & not woven.  I immediately changed the entire set & tomorrow or Friday I'll have a chance to hear & feel  the whole piano.   Regards   Dale Erwin</blockquote></body> </html>