Wow, that tarp will be light. Do you get the cuben directly from the company? Is it hard to get?
I'm using Air Core Plus, plus Hennessy tree huggers on one of my hammocks. That thin little cord gives fantastic support; no give or stretch; solid stuff.
Instead of whipping the hammock ends like Rick does, I use cable ties. No they don't stetch or chafe the rope. I used them on my bedroom hammock all winter with no stretch or rope wear. An advantage of the whipping, besides saving the wgt of the fabric knot, is that it can be removed to launder the hammock and then be replaced. The cable ties can be carefully cut off and replaced with new ones, too.
Here's some food for thought: can you think of other uses for tree huggers? I've wondered if they could somehow be used for a waste belt or shoulder straps for a backpack; or maybe at least compression straps, although I don't usually use compression straps. One problem I can see is that if it rains during the night, they can get really dirty from the tree trunk; plus they're wet then.
What do you think?