Re: Vectran sleeve for anchor rode?
To the best of my knowledge, none of the rope you have mentioned has any elasticity. 5 tons versus a 33 pound anchor (bigger in more wind) with no elasticity is a recipe for disaster. Do you use dacron double braid, Vectran, Spectra or Dyneema for dock lines?
Good luck thinking outside the box on anchoring. You don't have to be a circumnavigator to have a 50 knot squall (or more) come through an anchorage kicking up some pretty ugly seas.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.