As a professional arborist too, I would like to second what Bluenose said.
And if you're gonna be 70' up, PLEASE PLEASE for the love of all things holy, don't use paracord to clip your hammock in!!
Even if it's doubled, the tensile strength goes way down when you knot it, sometimes as much as 70%. Go to your local outdoor store and get some 6mm cordage or something that's at least got a tensile rating, it'll only set you back a couple $. Also, overhand knots tend to roll when pulled like that.
With that out of the way, the tarp looks good!
It's better to have
it and not need
it than need
it and not have
Formerly known as Acercanto, my trail name is MacGuyver to some, and Pucker Factor to others.
It's not procrastinating
, its proactively delaying the implementation of the energy-intensive phase of the project until the enthusiasm factor is at its maximum effectiveness. - Randy Glasbergen