Not so, I think. Any WDH with "dual-cam sway control" combines weight distribution and anti-sway. These "dual-cam" units are offered by many of the standard hitch manufacturers, such as Reese and Draw-Tite. All of these units operate in a completely different way from "friction sway control".
You might read Rocky Mountain Ray's tutorial on sway and sway control in the TM Reference Library, aka TM Info You Won't Find Anywhere Else.
Bill
|