I've never taken my bass to luthier. I called one that works a music store I occasionally buy from. I told him I would like to have my bass set up. He asked what I wanted, and I told him Truss adjustment, string height, intonation... I told him I would provide the strings. He asked what kind of strings I use. And I told him the tapewound flats. I told him it was a fretted bass. Anyway, he told me those strings won't work on a fretted bass as the frets will chew into the tape and unwind. I had these strings on two different basses for more than four years with no problem. I don't change strings often, nor have I ever broke one. I'm sure the guy knows more about guitars in than I do, but I don't want to change the strings I use because of his opinion. I know I sacrifice some tone with these strings, but I like the ease of playing them. Would you change your strings on the advice of a Luthier?