Hi John, I can't speak for a grand but I did have a client who was from Japan with an Atlas upright piano. It died sound wise. I also had a client with a 131 cm Yamaha--it survived with a DC installed in Canada Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. Tuner for the Saskatchewan Centre of the Arts drose@dlcwest.com http://donrose.htmlplanet.com/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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