I am a record collector and a few years ago when I renovated my house I built some record shelves for my collection. Mostly I collect 7" singles and I was looking for a compact way to store my collection. I had bought an old library card catalog at a yard sale for storing cassette tapes and one day it dawned on me I could build a similar type of cabinet scaled up to store 7" records. I built and installed the cabinets in my house and they have worked out great.