I have hobby books from 30 years ago that teach you how to build magnetic heads for cassette tapes. No pictures or anything but with enough patience you definit

I have hobby books from 30 years ago that teach you how to build magnetic heads for cassette tapes. No pictures or anything but with enough patience you definitely can build one today, at home (even then). Mind you, the size of the gap is not that big of the problem if you put your mind at polishing.