Had another go at making an extension for my screen. This time O used the inner anti-fog visor from an old Nolan helmet. Heat formed it to shape in the oven in a set of pyrex dishes. Used some 3M self adhesive locking strips to attach it. At highway speeds it has cut back on the helmet buffeting I was getting. Not totally but makes the ride alot more tolerable. Take 3 when I get around to it will be a wider and higher add-on screen.