I use my sewn eye as a loop to larks head around the tree for my J-Bend ultralight knot to hang my hammock from. I only use camp nano23 biners and they're like a last effort to hang looong hangs or add length or hang stuff from; never anything directly against the seam or the stitches. The thread i used was whatever was on hand (some green surger thread from someones grama who passed on and it got donated and i snagged it for a buck [thanks someones grama!])so i over-did the piss out of my ziggyzaggy lines to ensure security. Also, i find that flipping the strappy over to create a twist in the lineloop that makes the eye makes one handed threading WAAAAAAY easier.