I'm not sure how to start a new thread, so I thought I'd toss my idea on here.
Woopie slings r great. Then I came across the UCR, which has a holding problem, but gives greater leanth per foot of material than a woopie. Now I'm thinking why not just put an eye splice on each end of your amstee. Clip one end or hang it from you marline spike or what ever, the feed the other end through the hammock attachment your using and secure it with a klemish knot or prussik. Easy adjustment, simple to make and lighter the a woopie.