I havent read the entire post so escuse me if someone has already said this.
In wouters diagram it looks as if the port and starboard bungees are connected. I would advise against connecting any of the bungees to each other. If one breaks, then 2 are free to get all tangled up. Double your bungee(run bungee to other side of the hull and back) this will give you plenty of slack to go around the forestay if that happens in a pitchpole, but will also allow you to keep tension on the trap handle.
David
www.teamseacats.com