The 5.0 and 5.7 were great boats that did tack easily, but the 21 was a bear. I couldnt tack it in heavy seas when it was blowing 20 plus, and we were too sceeered to gybe that day.

Hans does have some great ideas, and IMHO, his rudder castings are the simplest, most user friendly castings made.
Oh, and his charitable work is helping feed thousands of people world wide. He helps communities build fish farms to feed themselves.