Hey all, Brandon here. I've spent a few weeks lurking and researching and finally took the plunge and made a couple hammocks. Now I'm in the middle of my tarp project and have a question. I'm following the Hex Cut Tarp pattern from DIY Gear but haven't read anywhere if I'm supposed to do a single line hem or a double? I've got some 200d material to add to the corners and I kinda feel like that I'll do a double line on, but what about between the corners? Single or double?

Thanks!