By Patrick Sullivan After more than 35 years together, it’s no surprise to see a married couple finishing each other’s sentences. But Sigrun Seifert and Joseph Grubaugh are just as likely to finish each other’s instruments. Laboring side-by-side in their 900-square-foot workshop in northern California, the two luthiers have made and restored hundreds of instruments … Continue reading How One California Couple Has Made Violins Together for 35 Years