A pattern maker would use various tools such as a notcher, drill and awl to mark the pattern in places.

The notch could be made with a scissors, knife, hole punch, or "disk notcher" tool that was specifically designed for this task.

But Pond Pavarotti, which qualified in third place, is up against second favourite to win the classic, Glengar Ranger, and another top notcher, Taringar Bay.

When users discovered this, they began buying the less-expensive single-sided disks and "notch" them using scissors, a hole punch, or a specially-designed "notcher" to allow them to write to the reverse side of the disk.