I've started a quarter scale model of the CarBEN EV open source design:
The first two sections are at the tallest part of the roof, and the red marks are the edges of the windows. The lower parts of the section will go under the longitudinal section later. Five sections cut, and 48 to go... Then I'll fiberglass the skin, and be able to either tuft test it (on the roof of my car?) or maybe get it into a wind tunnel?