I've been using Excel D12 3.5mm now for 4 years on the Stealth, yes it has stretched a bit initially when first made, it does abrade slightly around the bridles where the spinnaker constantly rubs, and it does look a bit dirty after a while, but the advantages are so many that I cannot understand why more experimental boats are not using it.
What are the advantages, very easy adjustment of length of stays to the extent that I no longer have adjusters, its quicker to simply resplice the stay, extremely light in weight, doesn't snag and rip clothes, very cost effective if you take into account the need for any alteration of length and I can go on and on. Give them a go you will be impressed. <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />