So for a fun summer project Im gonna be butchering a few bits Ive got to create myself a new Frankensteins Bass. Ive got a cheap P-bass (defretted) that Im gonna slam an MM style pup into. Id like to get the MM pup as close to the sweet spot as possible, so the Split P is getting flipped (the section under the E & A stays put, the other half moves up on top). Ive scrounged various components, got a cheap MM pup on order and have been digging up old threads on MM/P configurations for the last week or so. Next stage is to figure out the wiring set up, which is where Id like some opinions, advice, or rude comments. Passive set up 1: Split P pickup and MM pickup (wired parallel) connected to 3 way selector switch, regular tone and volume knobs. Passive set up 2: Split P pickup and MM pickup (wired parallel) connected to individual volume knobs and regular tone knob. Passive set up 2a: As set up 2 but with 3 way toggle for MM series/split/parallel Passive set up 3: Both pickups wired to stacked volume/tone knobs, possibly with series/split/parallel toggle for the MM pickup. Active set up: Split P pickup and MM pickup (wired parallel) connected to 3 way selector switch, connected to active volume bass/middle/treble Im not worried about getting the exact MM tone. The active preamp I have I tore from my 6 string (which now has an amazing ACG filter stack) and to be honest I dont think its gonna be a comfortable fit under the scratch plate, certainly not without a lot of extra cavity routing and swearing. Plus it is a potential minefield of coloured wire disastrousness (being colour blind can be a bitch). The Passive options appeal because they feel like less hassle. Plus theres something about doing a stack knob that I really need to get out of my system at some point. Stack knob MM/P bass anyone? Mmm. What sounds feasible? Why? With the MM series/split/parallel switching option has anyone got experience of using it in an MM/P bass? Passive or Active? How does it sound? Ta.