Re: Modular Preamp.
You can wire the pickup to either be "normal" or go through the pre-amp. It just takes a 4PDT switch per pickup - of which a push pull version does not exist. The main point of the Blackouts modular preamp is to turn passive pickups into actives, mostly resembling Blackouts, but with a slightly different flavor due to the inherent influence of the pickup itself. And you could probably wire a boost control to it - you're basically just putting a compact boost circuit between the hot wire of the preamp and the output jack. Just like having a boost pedal, but inside the guitar.