John,
You fooled me with that dummy dummy. Of course, if you are daring, Alembic can make a real pick up for you to put there, and then you would have 3 active tone sources! Wow! I have a similar set up on my Modulus Graphite Quantum TBX 5 string. It came with Bartolini's originally, but I Activated it with Alembic. The 3 pick ups have on-off switches, and a master vol and one filter w/ 2 pos Q switch. The sonic possibilities are almost endless. Of course, your Series Bass is just a grab away for more sound control, right?
Kris