I have a fretless semi-hollow bass that sounds remarkably similar to an upright. I have the nut set at around .025 off the fretboard and the bridge is somewhat high. the neck relief is set fairly flat. I am getting a really good mwah sound with no off-color sounds. however, the action is higher than I am accustomed to. I have no experience with upright basses. How is a typical action on an upright (or is it as varied as any other instrument?) I read that a lot of fretless players have a VERY low action across the board, but I typically pluck around the 20th fret on the fretboard to get a dubby sound and the larger string vibration may not support a lower action. Any tips/advice on the setup? Should I just leave it?