A buddy had a 39' sailboat that he often sailed single handed and the genoa headsail on that boat was a huge thing that really took two men to handle but he rigged up a Milwaukee power wrench so that he could use it for hoisting and trimming that sail on his self tailing winches and it worked, though the batteries didn't last all that long due to the biggish torque required. I'm thinking one of those might be a viable solution for my mini knee mill because cranking it up and down has really become a pain to me.