Just FYI: The RS400 jib uses:
Pulley on top of the jib giving a 2-1 purchase. So the halyard comes out of the mast at the hounds, around the pulley on the top of the jib, and then back to a fixing point a couple of inches above the halyard exit.
The wire loop at the bottom of the halyard is pulled out of the mast just below the gooseneck and attached with a hook to the simple cascade purchase. There is a pulley on the hook; the rope leads from the hog up through the pulley, and to a second pulley. This pulley has the control lines on it that are led out to both sides of the boat, so you can adjust easily on shore or while sailing. Total purchase 8-1.
Cheers, Chris