Todd, No, I haven't. I'm not sure it's even legal, since I understand Dampp-Chaser has a patent on the undercovers and backcovers. Regards, Clyde Hollinger, RPT David Renaud wrote: > Has anyone experimented with different back cover > materials to enhance the effectiveness of Dampp-Chaser > systems in vertical pianos? Preferably something more > affordable than the "speaker cloth" that Dampp-Chaser > sells specifically for this purpose. Also has anyone > tried covering the slot under the keybed to help make > the systems more effective? > > Todd
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