In 1772 this problem was overcome when a Scottish millwright replaced the sails with shutters that automatically opened and closed, somewhat resembling venetian blinds.
Më 1772 ky problem u zgjidh kur një mullindërtues skocez i zëvendësoi velat me grila që hapeshin dhe mbylleshin automatikisht, diçka e ngjashme me grilat veneciane.