as far as wear on the chains... there is were on the entire WDH... my e2 (which doesn't have chains) says that the product is only designed to be used for 10 years and that's not anything to do with warranty. on the other had, those chains are way stronger than you think... my father has a car hauling company and the chains they use to hold the cars down are similarly sized to the ones on a WDH. they crank them down to take out almost all of the suspension travel and then drive 65-70 mph down the highway and they drive 100k's miles per year like that... even in an extreme wreak where the trailer flipped the chains rarely break and the cars are still on the decks... even upside down sometimes.
