Bill,
Check the
www.equalizerhitch.com site for much information on the weight-distribution (WD)/sway control features of this particular weight distribution hitch. The site also has an excellent video.
We would never consider towing without a WD hitch and the Equal-i-zer not only does the weight distribution but also provides the added protection of sway control, as it incorporates sway control into its design and function. A weight distribution hitch may not be needed with the shorter TrailManors, according to a few members of this forum, but with the longer units it certainly is necessary, in my opinion. And having sway control in addition to WD is an additional safety feature. When towing there are too many situations that can suddenly come up which can induce sway. The truth is that any trailer can unexpectedly go into a dangerous sway, given the numerous unforseen situations out there, and especially when towing a heavier and longer unit.