After 44 years of service it was bound to happen. I have developed a fuel leak in one or more of the fuel/return lines in my 1975 Hatteras M/Y. Looked for the leak but couldn't find unless I rip up the floor which I don't want to do. I'm thinking of replacing all supply and return lines with rubber hoses made for diesel. Has any of you had a similar problem and how you solved it?