This wiring scheme may well work in-phase, however the only way to have the inner coils of the bridge and neck working together AND hum cancel is to reverse one or other of the magnets.
EDIT.. Although, if you have Blackhawks, the coils are symmetrical, so which coil you make the 'inner' is fairly irrelevant, so you can simply flip the orientation of the neck pickup around and reverse some of the wiring to give you access to the polarity-correct coils for those positions.