Furl at your own risk
Ron -I disagree with what you guys are saying about reefing headsails on the furling system. True there are systems that are designed for this, but it is the sail that you need to be most concerned with, not the furling system. Special provisions are made in the construction of roller/reefing headsails to handle the changes in the locations of the loads on the sail and to maintain proper luff tension. The tack, head and clew of every genoa is reinforced to handle the loads on the sail. When you partially furl a sail, you change the location of those forces on the sail to points up the leach and foot which are not designed to handle the loads - and you are typically doing it in conditions that are already challenging the boat and sail. This can damage the sail by stretching it. In addition, where you would normally want a very flat and depowered sail in heavier air, a typical, partially furled sail is very full in the middle and along the luff. This is because there is no point of attachment at the luff. Now, you can no longer control the shape of the sail using normal controls like halyard tension and/or backstay if you have one. The fairlead adjustment is the only control you have. And finally, if you do choose to roller reef like this, make sure that you have plenty of line in your furling drum. I knew of a friend who was sailing with a partially furled sail and as the wind continued to increase they decided to put the sail away completely. What they found out was that the sail under load had stretched so tightly around the headfoil, they did not have enough line left in the drum for the number of turns now required to get rid of the sail or roll it up completely. Instead, they were faced with unfurling the whole thing to take it down. They were not pleased.Be careful and think about buying a working jib.Tom D