Those FT-241 crystals for the tank radios, is there a way to "repair" them ? I know one of their major fail modes is that contacts come unplated. Will a small contact, not a plate like FT-243 and such, but a smallish contact pressed againsy where the plated contact was, with the just right pressure, will that resume piezo activity ? Lord knows, with a defective rate now of 75% or more, i have a lot of candidates to experiment with.