Wim, We should not forget what the first priority of the felt is: to quiet the action. Although, the Thin felt will not compress as much, using it will enevitably cause the action to be a bit noisier. Steinways have always used thick or even extra thick punchings. There are ways to pre-compress the thick felt, so that the piano will stay better in regulation. My personal preference is with medium or thick. Usually, so that I have a mimimum of punchings under the felt. Too many card/paper punchings tend to make noise, themselves. Just a thought. Best Regards, Joe Garrett, RPT, (Oregon) Been There, Didn't Like It, So I'm Here To Stay! [G}
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