 During the mid-seventies Morrison started a sail loft based in Polegate near Pevensey Bay.He developed his own systematic and precise means of designing and cutting sails which enabled precise reproduction of previous designs something which was an unusual feature amongst British Sailmakers at that time.Like many other yacht designers of his generation he was significantly influenced in his approach to both yacht and sail design by "Sailing Theory & Practice" by the Polish Author Czesław A. Marchaj, first published in 1964.