I'm starting work on a new bass.. Black Korina body, Wenge/Bubinga/W/B/W laminate bolt on neck, custom wound pickups, custom EQ, etc etc etc. I was originally planning on this being a 6 string (36" scale), but I'm wondering if any 7 stringers could comment on the transition from 6->7 string bass? I've got the hardware and wood for both, so it's basically just a question of whether I'll find the 7th string useful (I use all 6 strings now, but find high C more useful than low B). I've never played a 7 string before, and I don't really have any stores closeby that would even carry one. Any suggestions?