Re: Jazz with brass baseplate
Nickel steel baseplates have sharp treble, less midrange, and percussive bass. Brass baseplates have round treble, thick midrange, and round bass. I suspect the reason why Dimarzio uses hex head screws on the majority of their pickups is to sharpen the treble while attenuating the midrange slightly. I would use short fillister screws so it's not too bass-heavy.