Dear Indianajo,We were novice acoustic piano owner and did not take perfect care of our new Walter in the first year. It experienced wide swing of seasonal RH between 40%-80% and daily RH swing of 55%-80% in the Summer. Daily temperature swing of 60-F to 80F was common throughout the first Summer. Our tech finally got through to us after the first year and this 1520 has been in a stable environment since then.Did that first year of unstable environment somehow impact the piano? The tech thought so. Knowing what we know now about acoustic piano, we believe so too. Even the best built Steinway or that 50,000th Boesendorfer will suffer in such wildly unstable environment. Our tech happens to tune concert pianos and often works at local regional open concert events. He talked about the need to tune early in the morning before a concert began. As the day wore on and the RH and temperature changed, he had to keep tuning between performances. I do not believe he was exaggerating just to make a point. We dare not blame the piano for our mistakes.