My son asked Santa for his very own 1 pound spool of Kester 44 for Christmas. Both of us have only used 60/40, so we have no direct experience with 63/37. Is there any benefit to 63/37 over 60/40? This is for general purpose hobby use. He is into audio equipment, so it would be used for connectors, printed circuit boards, point-to-point wiring, etc.