I've got an F Bass with the standard vol/vol control configuration. Has anybody modified their F Bass replacing one of the volumes with a blend control? I'm considering doing this but I've not been too happy with the passive blend controls on other basses. They typically have very little variation other than neck/both/bridge. I know that F Basses can be ordered with the pup blend and a master volume. Anyone out there played both configurations that can compare the two? Thanks!