True, kitebuilder.com is a good resource, but not so much for dualline. For those there are better. I'm currently in the process of building my second dualline. Start with a website called Tom's kite building site, where you'll find a lot of those questions answered.
Not a lot of Cuben fiber kites due to the expense of the fabric! Some gliders mostly.
Pretty sure you could find patterns on a site called Kitebuilders - lots of plans for single, dual, and quad kites on there!
I have realized that I have a special situation that most would drool over and should probably take advantage of it. My day job is at Mystery Ranch backpacks and I have access to just about everything needed to build kites especially the most expensive things. I probably should take advantage of this opportunity...
I was wondering if there are any digital patterns out there for dual line framed kites? Like optitecs files etc? Or are their just hand patterns?
It looks like everyone uses a zig zag stich which is smart. Has anyone made any Cuben fiber kites? What fabric characteristics should I be looking for? Did you also glue the seams? Where do you get all of the fittings for the carbon rod?