This is in answer to the question about tight flange centers in older YC pianos. In the early to mid 90's it was common to find YC action centers that tightened up with friction. This was due to improper sizing of the bushing cloth. In essence, the wool was not shrunk enough to stabilize it. As the piano was played, the friction expanded the fibers of the bushing cloth causing them to choke the pin, often to the point that the pin would turn in the wood, rather than in the cloth. The pins were never the problem. Occasionally, an alcohol/water/heat treatment will help, though reaming and repining is the only sure answer. Don Mannino did extensive work on this while he was with Young Chang. It was the inspiration for his straight reamers and the excellent class he conducts on action centers. Since then, the "secret sauce" and process used for treating the centers has been standardized, so this has not been an issue for some time. However, many of the pianos found in this situation might still be covered by the warranty. Thanks, Phil B. Glenn, RPT National Service Manager Young Chang Acoustic Pianos (800) 874-2880 x110
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