RG, that assertion was made by JeffS, not Wouter.

Aside from that, the fact is that the F12's currently being designed and built are under or very close to the weights of similarly sized existing classes, which shouldn't be unexpected. There seems to be some confusion about platform and rigged weights.

To clarify my previous posts, my platform weight estimate is 35.4kg and rigged weight is 50.9kg (with a very crude rig weight estimate). So this isn't far from the proposed rule weight of 50kg.

From a design point of view, I could've dropped the design displacement down a fraction to 100-110kg, but to tell you the truth at this size of vessel my opinion is that it is best to design for the heavy side of the weight range, hence 120kg. Unless ofcourse you have a range of designs to offer.