Having been a bit disappointed with wire stays ( weight, non adjustability, hard on the body when bounced into, tendancy to kink when derigging amongst other things )I've started using D12 for the main stays and trapeze wires. Seems to work really well but does tend to " stretch " a little when first made and you really must follow manufacturers guidelines when splicing ( as I found out when my trapeze let go . Has all sorts of advantages mainly being 1/4 the weight of wire and stronger for the same diameter, and what I really like is that you can adjust the length to your hearts desire ( I'm even considering doing away with adjusters as once you have your boat dialled in, how often do you change mast rake ). Don't be put off by the splicing as it really only takes minutes per eye. To date I have had only positives and no negatives. For anybody building and prototyping rigs etc it must be a real winner. Longetivity seems as good as expected, I've had a front stay and bridle in use for over 2 years now and there doesn't seem any real wear or degradation of the rope.