Lastly because I miss having a C string on a fretted bass, I purchased an Ibanez 5 string 28.6" scale bass & I love it. My strings are GHS boomer 107 (short scale) 80 60 40 30. Big surprise! As well as tuning E-C, I can tune B-G. If I pluck that 107 gauge string carefully I get a nicely defined open B. The big surprise is that the other strings are loose enough to achieve some of the seemingly impossible effects Stanley Clarke get.s (The guitar-like vibrato, the tremolo overtones pulling the strings behind the nut). When I tune those same strings E to C, the action's raised & higher, but still there's far less tension than a 34" scale bass.
Tuning the same gauge string both to B-G and E-C? I think that is not good for the neck. Tuning down a fourth lower and switching back to normal tuning on a regular bases is a lot of difference in tension.
