This was quite common back when. When a single-sided floppy cost about $5, it was a no-brainer to see if you could convert it to read the other side as well. Y

This was quite common back when. When a single-sided floppy cost about $5, it was a no-brainer to see if you could convert it to read the other side as well. You only needed a piece of cardboard to act as a template and a one of those leather punches. My 20 floppies instantly became 40, saving me around $100 bucks. A couple of years later, double-sided floppy drives arrived and we didn't need to make our 'flippies' any more.