I still say, it's the bassist and not the bass. If, playing the basses that I have, I sounded like Jaco or, any other great bassist, I would be happy and, there would be no desire to look for another brand. to hopefully improve my sound. Yes, there is a slight difference when going fretless or adding strings or going to an upright but in the end, we end up sounding like ourselves and the only way that will change, is with practice, practice and more practice. I get bored with the basses I have and gas over new instruments but the reason is, that I am bored and know that if I purchase a new bass, I will soon become bored again. If I practice enough, something new, and can hold it together on stage, the feeling of satisfaction I get, far exceeds that of purchasing a new bass. At jams that I attend, I see and hear many bassists playing many different basses, usually through the same house amp., and, while they may sound a bit different if the bass has more strings or is fretless or an upright, I can close my eyes and know who is playing, by their style. Fender or, another brand of bass being played at the jams makes little difference, but to me, a good/great sounding player does.