My sadowsky 4 sounds great with the .105 E string tuned to C, yet most 5 strings sound relatively wonky with a .125 or .130 tuned to B, especially past the 4th fret. I find that confusing. Should we all be running .115s for low B? For the record I've had some 5s with great B and E strings, but they are crazy rare IME, and even rarer that the one bass with the great B and E is the bass I want to play overall. And scale length has nothing to do with it. Most 4s sound great in D, if not lower.