Should one worry about stressing the frame by jacking one side up a ways?
Yes and no... I would not be concerned about the frame, but if you twist it (my Boler
twists significantly if I jack on one corner) the [b]body will either flex or crack... and that's not good.
If the frame of most of these trailers is lifted, it should be evenly on each side, or near one suspension mount (see the leveling jacks on the new Oliver
Legacy for a nice illustration of that approach). I think that jacking on one rear corner to do anything more than take up slack and stabilize it a bad plan, which is one reason why Byron's method (which seats the trailer firmly on the stabilizers, but doesn't try to lift with them) makes sense.