My point was regarding the use of the bumper tiedowns that are used in many cases with large campers. The bumpers just aren't built to support the loads placed on them by these heavy campers. We have seen in the past several times just on these forums references to the bumpers being bent when using this support method. I have nothing against the Happijac system although I also have the Torklift system.
I have often wondered how the Happijac quick release and the Fastgun units compare with the turn buckle and chain system as far as strength is concerned.