Perhaps a dumb question: Do you tune a 6 string bass the same as a guitar? I mean, of course the notes aren't the same, but does your open G remain a G as on a 4 string or do you tune it down 1/2 step like the 2nd string on a guitar? Also, is there any reason you can't jump from a 4 to a 6 string? I can't see wasting a few hundred bucks on a 5 when the goal is to play a 6. Or, would I find some uses for a 5 that I never suspected?