Somewhere on the forum I read a post (by Tim) that mentioned that if you store your extra pickups in a drawer they may demagnetize each other, and you should always store them in separate boxes.
I have stored them in separate boxes (mostly), but I wonder. The standard BKP box is not that thick, and when my set of Crawlers arrived, they were in the same box, an inch or one and a half apart from each other. And the boxes I have are in contact to each other anyway.
Just how far away is safe? And should use some specific material to isolate the pickups from each other?
