The bottom is slightly flattened out (not as much rocker), and yes it seems to be better for downwind performance.

The boat that I was on had the standard “old” rig. I did not hear that there was a plan for a winged mast. I am sure the rig will change a bit due to the testing that went on, but I cannot tell you how.

It did have canted hulls, which also cants the daggers. This requires there to be two sets of molds, one for each hull. There was a bit of testing on the placement of the daggerboards (rake angle, forward or back) to figure the optimum arrangement. I am sure that they got them right.

The hulls are wider, about 25% (maybe a bit less than that) at the waterline, than the older boat, making it very buoyant. Sits high in the water. I liked sailing it.

Later,
Dan

This is a drawing that Paul te Buck of Holland sent me. It is pretty acurate. I think that the hull length in front of the crossbar may be a bit exaggerated. It is almost the same dimensions as the pre-2006 model.