You are wright Rolf, this the boat. I don't know the weight of the boat but, because we had to increase the thickness of the aluminum on the cross members for stiffness, I suspect the boat to be 5 to 7 kilos heavier than the 170 kilos claimed by Nacra. I have a 9 feet power bar to right the boat. This is something that I have builted myself. It works quite allright since I was able to recover once from a turtle (complete upside down). This power bar also had some weight!