Recutting a used genoa
Actually the leech of the sail is usually the part of the sail that is in worst shape. There is comparatively little load on the foot. Also Kevlar is far more stress oriented than any woven dacron having very little strength on the Bias compared to parellel to the fibers. You might be able to recut a dacron sail yourself but unless you really know what you are doing doing a Kevlar recut yourself seems a bit like operating your own "home heart bypass surgery kit".