Re: Raising or Bending Live Oak Limbs on Hist. Sit
Briefly....
Tenex is a lot cheaper than full static lines, is quite low stretch, and is plenty strong. 1/2 inch is all you'd need.
Shouldn't need cobra...as the installs are temporary.
To avoid damaging the bark/cambium, careful choice of material is important. Either pad the area to be tied with old carpet, or use something like Tufflex slings...which should be basket hitched rather than girth hitched. (But if basket hitching is used, limit the loading to directly inline and installed such that the sling can't slip sideways which would cause damage.
If A GRCS is available, use it. Far better than the Hobbs for this. Otherwise, I'd think that a 5-1 pulley system would be able to do the job. Two people could apply over 1000 pounds of force. Might be enough....
To retrieve gear from the ground is probably not practical, in light of my 3rd paragraph.