Good and Bad about Blue Ox Sway Pro

I'd venture to guess that trailer sway only involves a small degree of articulation between the TT and TV. Even the one time it happened to me with a trailer with negative tongue weight, just a couple degrees (if that) was enough to to start steering the van for me. (Luckily there was a pile of large rocks where I happened to pull over). Point is.... I don't think bar-load-changes do anything for sway.