I just got a 1949 Kay M5 B ( Maestro 5 String Blond) . It is set up with helicore Hybrid (Gold Green Gold on the Bottoms) it has the B string on the bottom (BEADG). I play Bluegrass but am learning arco ( I am a fiddler) and the low B is not a big help in BG. I want to switch it over to EADGC. Will I need to get a new bridge /nut or can I just remove the B, shift the strings over and add a C? Do I get a Cello C String? I'm relatively new to Bass, so I apologize if these are less than stellar questions.