SOLD I have 3 brand new and unopened sets of FBass exposed core strings for 6-string bass. These go for $45 + shipping on the FBass site. NOTE: The 3rd set is a 5-string set with an added .29 gauge non-exposed core high C from FBass... Which George started using recently, he said at NAMM that he preferred a non-exposed core for the high C. Open to straight trading for DR Black Beauty 6's. Thanks in advance.