OK, before my long section hike I wanted to try the Penburthy knot on my tarp ridgeline. Ordered 6 Penburthy Zing Its from Opie (maybe they were Lash it)...each is about 3 inches long with a dead eye loop in each end.
Now after many uses I can say that FOR ME they are far better than using prussics on the ridgeline to attach and adjust the tarp.
The Penburthy truly is easier to dress and maintain than the prussic.
Thanks Opie and I'll be ordering more as I transition the other tarps to the better system.