Considering upgrading my 1967 Contest 29 with a roller Furler. Is this a DIY project? Doesn’t seem too difficult. Which type/brand is best in terms of jams? Any reason not to buy a used one if it’s working and in good condition? We sail on Lake Michigan out of Waukegan, IL. Any suggestions on a sail loft to recut my Genoa for use with a roller furler?