My name is Tara and I have a 1973 macgregor 24-25 and I have a roller furling I want to put on now since I sail alone. Does anyone know what size the sail needs to be. I found a sail on craigs list for a 26 foot sailboat and I don't know if it would work. The sail is Luff 34'7 Leech 31'6 foot 11'6 .....email me at millertara@yahoo.com .