I gotta say, I originally tried figure 9's for the tarp ridgeline but I couldn't get it to hold very well. Tarp Flys solved that. But I use the little plastic 9's for all 4 corners and I love they way they pull the tarp taut with 2.2mm Exped dyneema.
That is a great looking set up. Thanks for sharing the experience!
Thanks for sharing your experiences. Your setup sounds great!