You tied a figure eight knot on the ridgeline ?? Do you mean the thin line INSIDE the hammock ??
No, outside the hammock on the line between the tree and the hammock.
Like Aardwolf, I recently made a figure eight, on one of the big external rope, going from hammock to the tree. And it is really easier to correctly tension the rope.
That is
exactly what I was doing, and yes it does really do the job ... except for that nasty little side effect of the line breaking and pitching you on the ground.
Good thing I was inside on my back when it broke. I hit with both feet simultaneously and wound up in a sort of semi-reclined, seated position. Had I been on my side, I could have had a spinal injury. Also highly fortunate (thank you, God) was that I had put the figure eight on the foot side of the line and not the head. Getting dropped on the head, even a dense one like mine...
I sent a mail to HH, asking if there were any risk doing that. Unfortunately, I never got an answer. Should try once more.
Please post anything that you get in response. Here's what Hennessy sent to me in response to my inquiry:
I think the breakage happened because of the carabiner/trucker hitch combo, not your body weight. Of the thousands of ultralight backpackers in use, only two
or three have had rope problems and all were associated with a
line-tensioner or carabiner.
Note: I had inserted a carabiner through my in-line figure eight knot and run the line through the carabiner instead of the loop itself so as not to have a sawing action as I tightened up the line.