thats exactly what the Dart 16 needed. A spin and twin traps.
Now it only needs some more platform and hull stiffness and some proper boards and .... Gee, then they'll have ended up with the same 3 sails glass beach cat that they were trying to replace with the tupperware rotomolded vessels.
Conclusion; they could just have skipped this whole polyethyleen stage and produced a proper beach cat from the get go !