I am making my first tarp. Adding pullouts 18" from ridgeline, 28" from edges on a 11'x11' tarp. I will be using 3 layers of silnylon on the inside as the patch. Patches are 6" in diameter 2 per side.

Have searched here and can't find any pictures or advice on exactly how to sew the patches on. Do you just sew around the perimeter of the patch and then sew the grograin to the outside with a boxstitch? Do you sew the perimeter of the patch and then "X" the center? Other ideas? Pictures?

Thanks in advance.