All the steering is done by kite only, which works very well. I can go anywhere from upwind up to 60deg off the wind, to dead downwind(but obviously wouldn't need my invention to do so), by changing the kites position (in the wind window).
I had build and tested a smaller version for touring as well, with which I would still be faster than paddling(~4knts), using a smaller kite of 3sqm and traveling slightly upwind.