I ordered 13 feet of hammock material and just finished whipping it today. I've tried hanging it with a structural ridgeline, but the hammock is so long that it has plenty of sag without the ridgeline. And it's a lot more comfortable than my old 8 footer. I also let the sides stay even instead of pulling them up, I can lie on the diagonal more comfortably now.
Anyway, what do you guys think about using longer fabric materials as opposed to using a structural ridgeline?