... he was planning on having a small piece of very low stretch line attached between the ring and sail to make up the difference for the shorter sail. He then attached a small diameter line to the ring to allow him to be able to unhook the ring without too much trouble.
I used to have a Nacra 5.5 on which I used an old Nacra 5.0 mainsail when the wind really picked up. It worked great and kept the boat under control in higher winds (usually used in winds 20-25 MPH, out solo). The problem, as it was shorter and I tied a line from the sail head to the ring, was that the ring would just twist around causing hooking and unhooking problems. Half the time I had to put the boat on its side. I tried the separate line to the ring mentioned above but still had occasional problems.
