I've been a rockabilly player for several years, but through research about the beginnings of slap bass style I discovered and fell in love with old jazz. Well I'm now playing in a jazz trio and were doing some jump swing and some old standards and I'm still using the gut strings from my rockabilly days,I was wondering if anybody could recomend a string with more tone and sustain yet still have a old trad. sound.Am I wishing out of reach. Any advice will be greatly appeciated. Bobby D.