I thought the only choices for Q-switches were 0/3/6 and 0/6/9? If there was a 3/6/9 switch option there would be no way of defeating the Q-boost.
Both of my basses have the 0/6/9 option, I rarely use the 9dB boost but like having the option. I thought about the 0/3/6 switch but didn't feel a 3 dB boost would be that audible and of little use to me. I was used to playing my Alembicized Modulus with no Q-switch, now that I have one installed I sometimes miss the 8dB boost that was always "on" without the Q-switch but also like the option for no boost along with the 6 and 9 dB options.