I just have to know. What is the deal with 6, 7 and whatever string basses? I have been playing since 1974 now and I still find the traditional 4 with twenty frets challenging and I have had people come up to me virtually everytime that I've played in public tell me "man, you really play great bass!" I will admit that I also play five string and fretless basses but the whole concept of six plus strings eludes me. And folks, please don't those give the tired line that I usually get "well, I don't have move laterally so much" 'cause the only thing that tells me is that: a) you don't know your scales b) you don't know your neck Thanks!