CatWoman,
The CRAM N5.8NA fleet all seemed to use Jake's "Plan B". By attaching the end of the bungie at the hull, going through the diamond wires (around the front of the mast) and to the other hull forms a triangle above the main beam with the peak at the mast.
CRAM has lots of sailors that own or have owned the N5.8NA. Bring yours to Benton Harbor July 23 - 24 and ask for help. There will be lots of people who can help. If you can't wait 'til July, CRAM's first regatta is at Higgins Lake May 21 - 22. For sure, don't miss the Cat Fight August 19, 20 and 21 at Muskegon State Park. Racing on Friday, Saturday and Sunday, legendary parties, and near 100 boats! If you only did one regatta a year, make it the Cat Fight!
BTW, Mark Biggers of the Cathouse (cathouse1 at speednetllc dot com) attends and races at CRAM's regattas, has great advice, and usually the parts you want. He is probably the reason there are so many Nacras in CRAM. It has been nice having the dealer at regattas. When I break something (way too often

), he can usually get me back on the water quickly and the weekend of racing is not lost.