Looked at a 504QA for a potential buyer today. Nice case, action like-new, but badly out of tune at least 100cents flat, and a very flimsy soundboard/ribs/bridge assembly and no backposts. Kawai's current model listings don't include this model, and their decorator console now features backposts. Looks like a "run don't walk" situation, but I would appreciate any experiential info that anyone might have regarding tuning stability or early failure modes. thanks Mike
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