that is complete horse shit when i was a kid i used to take seymore duncans and take out the origional poles and place s.s. poles in them, that right there made a high sonic difference....or when i had a invader i remoed the ellen poles and screwed a stainless steel bar across and used measure bolts to hold them in place made of s.s.
wam after i had potted them again, i then tore it up
everything you use in a pickup matter, down to material, and types or winding teq.....im sure everyone in the foum laughed at ur responce, yes it is true about magnetic fields, but it is not true about the actual characteristics some materials have
ive tinkered enough to know that when i mnoddified origiuonal pickups it was easy as 1 2 3, thus was a reason why i continued to do it.....
wich is why pickupo companies offer different magnets, types of wrapping, coils, epoxy holds wax holds, chryogenic tempering vrs. magnetic tempering.....all kinds of different things, and assured you should be that they have secrets that give ther pickups charachter versus the same material used and unskill winding, or not proprietary instalation
i used to take old bobs and use a turn table asn rewire them with thin/soldered joint/thick wire/then soldered joint thin wires......and so the coils were off in thickness throughout i had myself a self phasing pickup that alowed me to shred all the dynamics i wanted in c tuning
now, well thats the drop d model that lace makes and let me tell you, they have better machines than i did(turntable)
point made
material serves a dynamic purpose and makes a big fifference