Reading about the Spanish Civil War here, I'm reminded of a book I've just finished reading, called ZigZag, about WW II british spy/espionage, and got to wondering about the German magnetic tape machines that were found in Germany during/after the war. What were the first U.S. record companies to use this medium for recording? When? Anyone know the progression of events in this field? Equipment? Wasn't this the beginning of having the capability to overdub easily? Rod