The very rare survival of a 'Horse mill', engine or 'gin' at Wester Kittochside has been professionally excavated and restored to working condition. It had been used to drive farm machinery, such as the winnowing machine in the corn barn which removes the husk from grain, powered via a rotating horizontal axle drive from the gin. As already stated, prior to using horse driven machines a flail was used by the farm workers to separate the grain from the husk. The flail itself being a wood pole with a smaller pole linked at the end via a chain or leather thong. Another door opposite the existing barn door used to provide sufficient wind to separate the grain from the chaff or seed husks.