Ive just bought a Fender Jazz fretless (Mexican) Im really happy with it but have a question about the strings. It comes with (I think) really heavy strings (55 70 90 105). I intend to replace these eventually with my regular gauge of 40 60 80 100 which will probably be Rotosound flatwounds. Should I do this sooner rather than later before the bass settles in with the heavier strings? Are the heavier gauge strings better for the bass?