I have a 1971 Ericson 29 with pretty new sails. They have no numbers on them. I have my old sails so know what the number should be so need to get them on the new sails. I want to try some racing so need this id.I was going to juse use a colored sail repair tape and put them on in block style. I looked in the archive and saw nothing about whether this is a good way or not. Is this the right way or is there a better method?