And a rowing skiff would never have the stiffness to support the rig tension
That's easy enough. All that's needed is for the carbon structure that incorporates the wings and shroud loads to go under the shell's foredeck and pick up the jib and spinnaker tacks.
This link:- http://www.yachtrevue.at/news-segelyach ... 42200.html
suggests it carries a small ballast keel if my interpretation of Babelfish' German/English "translation" is correct, and also suggests that the boat is stressed for a maximum of F3 winds. It seems to be on the Mondsee in Austria. Have any of our continental friends come across it?
Thats correct - the article mentions a "Ballast Daggerboard".
Personally i think this is the desperate attempt to achieve some fun and speed on one of the low wind venues in the alps. I sailed in my youth on the lake of constance where there was almost no wind when the weather was good in Summer. The Mondsee and some other lakes deeper in the mountains are famous for having even less wind. Only the Lake Garda or other lakes on the south side of the alps have the famous thermic winds conditions.