Introduced on the CLF Research Doheny V12 in November 2018, this is the second Magnetic Field Design (MFD) pickup developed after Leo’s passing. The history of this adventure taken on by Dave McLaren, with assistance of his brother John Jr, is described on the CLF Research Facebook page as well as in these 5 posts on the the Guitars by Leo website (part 1, part 2, part 3, part 4, part 5). Clearly the V12 is a logical extension of the JM but with important differences. The V12 shares the footprint but as can be seen from these pictures, the coils have different dimensions. Whereas the JM bobbin has a wide splay and narrow aperture, the V12 bobbin is narrower and higher. Note that for both the defining feature that makes them MFDs, i.e. the magnet at the bottom, is not shown. On the CLF Research Doheny V12 each pickup has its own 3-position mini-toggle switch allowing the coils to be wired in series (up), single-coil (middle), and in parallel (down). For the exemplar on featured on this site this is expressed in the DC-R values measured: 5.84kΩ/2.96kΩ/1.49kΩ (in series, as single-coil, and in parallel, respectively) for the bridge pickup and 5.27kΩ/2.67kΩ/1.34kΩ for the neck pickup.