G'day again I've been having great fun on my 5.8 while you've been hybernating. I took some photo's of the downhaul setup on my 5.8, this has a continuous sheet that you put around your sidestays and tie the ends together so that your crew can use it on the wire. You just put the hooks through the eye in your sail and pull down.
I sorted out my jib downhaul by putting a camcleat on the chainplate on the bridal foil. Previously I had it go around a block then to a cleat on the main beam but this made the bowfoil rotate upwards into the wrong position to support the mast.
regards