Pulled my old 78 4001 from the closet the other day, still strung with Rotosound 66. Great bass, but I've gotten so accustomed to my Precision with Chromes, and my Jazz with Fender flats, that I'm considering making the switch on my Rick. In particular I'm thinking about the Fender 4590L set, and possibly even using the Ricks mute, although the bass side thumb screw seems to be frozen and the felt may even be dry rotted. I play in a 17 piece swing band and use a Markbass combo. Any suggestions?