sentences:  He started playing the guitar at age 11, and moved to New York in the early 1960s in order to work as a studio musician and guitar repairman.In 1965 he opened his own guitar repair shop, 'Dan Armstrong's Guitar Service', on West 48th Street.The building was razed in 1968 to make room for 30 Rockefeller Plaza, and Armstrong relocated his shop, renamed 'Dan Armstrong Guitars', to 500 Laguardia Place in Greenwich Village.