did you buy 099? its a great boat if you did.

The reason for the two shackles is to get some seperation from the two lots of rigging, if you have them all on the one shackle you end up crushing the outside wires against the mast.

have a look at the pics of the hound fittings in the taipan 5.7 thread in general discussion. it shows the ideal setup with big rings welded on the ends of the wire to get some seperation from the mast.