Maybe this has been discussed, but I don't really want to go through the 49 pages to find it.
When negative rigging with the THT, what prevents the rope from getting toasted on the bark? When using a block, or even multiple x rings, the rope it either protected by the sheaves or the rings are perpendicular to the trunk...keeping the rope off the tree. Where as, it appears the THT would pinch the rope between the THT holes and the tree because it is always going to be line with the trunk, causing a lot of wear and heat on the lowering line.