Have we done "double tap to zero fader" as in Reaper, etc? At the minute I have sections of the band on groups and I key in "+2" to feature (ie, during a solo) and then key "0" to reset the balance. "DTTZF" would cut the process in half.
Actually, if you could find a way to incorporate "toggle +2/reset to 0" that 'd be even better.
