I have not gone through the entire thread, so it may have been covered...

What about running a piece of bungee the entire length of the hem? My girldfriend doesnt like the 'flappy bits' of my hammock, and i was thinking that running it full length would give her a foolproof way of eliminating the 'flappy bits' without her needing to try and adjust one end or another. Have a cord lock at one end just so she can control the flapping a bit if she wishes... Thoughts?