After fixing some issues in my wiring design, I finally tried with success a set of Mother's Milk in a Fender American Deluxe HSS, converted to SSS and...
I HAD AN ORGASMIC SESSION today.
Those pickups sound really nice. Very detailed, defined, cristal clear, with strong basses and sparkling highs. The attack is awesome, snapping (remembers me in some way how The Mules create micro-explosions in the valve when it's in its sweet spot).
Any of the 5 typical positions is clearly distinguishable and very classy. The pickup that maybe sounds a little bit less attractive is the bridge. To my taste it's a little bit treblier than wanted but, I recognize that cuts the mix really well and that works awesome under distortion so, no regreet.
Additionally to the 5 standard combos, my wiring allowed me to check the following combinations:
Neck in parallel with bridge:
Middle position of Tele like sound. Stairway to Heaven (studio version) vibe is there, and works really good for acoustic-like passages.
Neck in series with Middle:
A Dark sounding virtual humbucker. In some way, some sort of Neck humbucker, very nice for powerfull chugs, palm mutting, etc.
The three pickups in parallel:
Weakest of the combos. Slight quack, balanced sound, round and vey plain-EQ'ed.
Middle in series with bridge:
Like a virtual bridge humbucker, but less edgy. Works specially well under distortion and cuts nice the mix.
Neck in series with bridge:
The third virtual humbucker. A very open a clear humbucker. Very balanced and clear.
I also had some learnings:
Pickup's height is highly important (I saw the same with other BKPs). In other brands, pickups usually have a wider range of heights where they can sound well, so usually you haven't to expend too much time. Standard recommended settings of Guitar Makers do the trick.
Mother's Milk want to stay far away from strings. As you go closer to strings the sound becomes treblier and piercing, the woody tones are far away from strings. I let the neck pickup practically aligned with the pickguard!. Standard Fender settings doesn't work with these pickups.
Avoid mods that can bring additional high end to the signal path as, by example, no-load pot, 50's tone mod, treble bleed or to wire the tone to the hot output instead of to the hot input of the volume pot. The pickups can sound piercing with those.
Just my 2 cts. about those great pickups
