Hello, I have a 1986 Hunter 31 with original sails that are at the end of their life. I only cruise and never race but would like to add some performance to the boat. I plan to keep the boat for another 2-3 seasons so purchasing new sails for the boat would be quite a loss when I sell. I have started looking at used sails on eBay and have come across several sets of used racing sails that would fit in my budget. My question is for those of you who have purchased used sails, since the chances of finding sails that perfectly match the original dimensions are limited, what are the most important dimensions? For the mainsail I would imagine it is the luff and the leech since these are limited by the hoist size and boom length. For the genoa, my only limitation would be the luff. Is this correct or am I missing something in the bigger picture. Any advice you have will help. Thank you.