Steve Harris never used quarter pounders, eventhough it was written as people using it on SD page. He always had custom shop special orders. Where do I know? I've talked with SD custom shop and had a Harris pickup wound for me (it was long before, now they offer as a production model). BTW you can easily see that his pickups have never been QP, because QP has huge poles and none of his bass have.
"It is easier to disintegrate an atom than a prejudice" A.Einstein
Failed rockstar, fat whitecollar club member#1, Explorer Bass club #16