Interesting thread... As I stated earlier, I tie down to the frame, based on my experience as a tow driver. One thing is pretty clear, the frame is the strongest point on the rig to tie down to.
I've never had my straps come loose because the trailer hit a few bumps in the road, but I always make sure to compress the suspension a couple of inches when I tie my rig down.
I do find it hard to believe that this practice will prematurely wear out my springs. If so, I'd better upgrade my springs, because if they break down from being compressed on the trailer, they aren't gonna hold up on the trail at all
:flipoff2: