"Flippin Fearless" looks like an older Nacra 5.2. The Nacra 5.2 had the center bar that ran between the center of the front and rear cross beams, had no brial foil, had a boom (vice boomless 5.5) and had straight spreaders on the mast instead of spreaders that angled towards the rear. But I am not personally familiar with "Flippin Fearless"
"Flippin Fearless" was my 83 (maybe it was an 82) Nacra 5.2. The sails, a square top pentex mainsail and a dacron jib, were made by Calvert Sails in Florida - they did a really nice job. Frank added the spinnaker (I think it came from an F17...not sure) and the snuffer. Before doing so, he removed the decks and rebuild some of the substructure in the hulls - they were getting a little soft.
As far as the bridle foil goes, the current ones (N5.8, N6.0NA) do very little to reduce the stress on the hulls. The short bridle wires that go from the hull to the foil are still angled inward almost as much as they would be if they were part of a more traditional bridle/forestay arrangement. This angle is what dictates the inward stress on the hulls. The main focus of the foil is to allow a larger jib that runs lower where you can extract more power from it.
