WBG, I am finally understanding what you mean by perimeter loaded. What kind of ribbon or grosgrain are you using? Is it completely free to move in a channel? Such as if I cut it a one corner could I pull the entire ribbon out of the whole tarp. I imagine you at least attach it to the ridgeline. After sleeping in 30 to 40 mile an hour winds last night I finally see how you can make your tarps so tight.