if it helps any, I also have a couple of cheap Kalisto hammocks. they are rated for 300lbs, but I changed the suspension over on them, and they hold me as well.
P.S. get the blackbird, you won't regret it. If you notice that it isn't suppoting you the way you think it should, it won't last long in the for sale section.
I've always been crazy, but it's kept me from going insane. - Waylon Jennings