Jean-Marc, It sounds to me as if you may have already identified your problem, the hammers. Try shaping them if there is still enough felt left. If not replace them. Tell the administration that you simply cannot solve this problem without replacing the hammers! Hopefully this will help speed up the funding of this project. Doug Atkins Registered Piano Technician Cedarville University 937.766.7566 atkinsd@cedarville.edu
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