I am a new sailboat owner (Catalina 22). I was on the lake last weekend and a fellow sailor (one with much more experience than myself) noticed that my boom was hanging at greater than 90 degrees off the mast. He explained that the line sown into the luff of the main had drawn up and needed to be stretched. He tried to explain the process, but it included cutting around the rope and using a come-along or block and tackle to stretch the main back out. I have never heard of this and cannot find any reference to this process anywhere. Is this familiar to any of you? Thanks in advance for any advice to a new sailor.