BTW...
If you go with Dyform, Navtec hasn't been stocking it for a while. I know that Buzz at Ballenger Spars in Watsonville has several spools of various sizes of Dyform. Call him up if you go with Dyform. He makes rigs for all sorts of boats including Aclass, 5O5's, whatever. Good family owned shop, top quality, good to deal with.

http://www.ballengerspars.com/