Hi Joey, thanks for that.
As I said at the beginning of the opening post on this thread, I SHOULD be looking for my own sound and I have found one that I'm reasonably happy with (I just need to get the top end under a bit more control - it can be a bit glassy at the moment).
However, that said, one of the beauties of Alembic gear - both basses and pre-amps - is its flexibility and the ability as Dave says to find a sound that's in there somewhere. Playing in a function band as I do (weddings, corporate events, etc,) we only perform covers and so getting A bass sound is part of the equation; getting the RIGHT sound for a particular song from a particular era is the bigger part.
Nathan East's tone is a wonderful modern sound and James Jamerson's is an equally wonderful vintage sound; learning how to approximate them is part of the SF-2/F1-X learning curve. There's a helluva lot of tonal flexibility in my current set up and I am sure that lots of experimenting trying to emulate other people's sounds will help me gain a clearer insight into the way my bass, pre-amps, power amp and cabs can work together, but more importantly as both you and Dave rightly point out, it will help me find Rob Rybak's bass sound.
Thanks again
Rob