Originally Posted by GrizzlyAdams
You won't need a full hammock width of cord...just enough to fatten out the end. For that matter it doesn't need to be just one contiguous piece. Maybe a number of short pieces spaced out inside the hem.
Obviously the cord will need to bend easily to go with the folds. Maybe paracord?
Yeah, I'll do a bit of experimenting to see what gives me enough "knob" without being overkill. I should also mention that I have a couple of techniques that I've used before that result in very tight whipping. The one I've used most frequently is like a clove hitch repeated over and over again. The other one starts in the middle of a length of whipping twine and consists of single overhands repeating on opposite sides until the whipping is the desired length. If this verbal picture doesn't get across, and you're interested, I'll post pix.