Ok, So no boats listed here are at min weight as yet.
MattM, As a boat builder you should be aware of the need to build a NEW boat slightly under Min weight. This would be due to the natural weight gain that all boats will incurr over their COMPETITIVE lifespan. Its much easier to remove lead as a boat ages and gets older, both from natural water ingression to the core and through repairs etc. Pretty hard to try and find real weight savings after the boat is completed. As Wouter has described... He is looking to save from things like smaller dia wires and lighter battens, we are talking about grams not KGs with that stuff combined (unless he is using lead battens!)
I dont know any A class builders that aim for an overweight boat, Same for a Tornado, F18, 505, Finn, 470, 49er, 29er, 14ft skiff, IC, Farr40, TP52, VO70, hell Nobody builds overweight boats!! it would be commercial suicide..