I have understood that thicker the string, more tighter it is. Is this correct? I'm prolly putting on flats on my fiver and dunno what gauge to buy. My fretless has 100-45 set of D'Addario Chromes and they are all smooth and nice. I would prolly prefer .050 G-string since .045 feels bit thin but dunno how .105 E would act. But anyways the B on that Yamaha is bit floppy, perhaps flats would feel better(as they are tighter), so should I just take the thickest set I find?