Mechanical difference between roller furling and reefing?
What is the mechanical difference between a roller furling and a roller reefing headsail system? I know roller furling only lets you run with the sail all the way out or fully furled, whereas roller reefing lets you reef the headsail to different percentages. Is the difference only in the foil (stronger), or is there something else? Also, can a roller furling system be converted to a roller reefing system?