To look at this from another perspective, what right has an itinerate tuner to add something to the hammers on someone else's piano? Would not a hammer iron have the same effect without introducing something into the felt and be easily reversed? There would be no problem getting an iron and rheostat through security. I know that if I had a piano voiced for the way the resident performing artists prefer and someone came in and altered it for a travelling show, I be rather pissed off. Seek alternate routes, Jon Page
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