The Aussie system has been standard on USA boats for several years. The real advantage to the "Aussie" jib halyard is the reduction of mast counter-rotation. The mast, when compressed by jib halyard tension will have a tendency to rotate in one direction due to the side pre-bend caused by the jib halyard. The system will also help tacking as the mast will more easily rotate to the correct side during tacks. This is achieved by having the purchase for the halyard tension up between the jib head and the hounds. The tension of the halyard down the mast is just a much smaller percentage of the load. The original system placed 100% of the tension down the mast causing the pre-bend.