Man, we are about the same size and let me tell you, youve got nothing to worry about. I hand stitched boxed X's, with coats&clark
poly thread, for my first treestraps. i used some tubular nylon and have hung my hammock SUPER tight on them without issue.
Ive since learned the error of my ways but these straps were by no means professional(spelled:UGLY). I now use just regular harbor freight poly cargo straps now, exceptionally lighter and less stretch. easy decision for $3