Hi Rsmith: I also have the same trailer and now on my 3rd hitch.. I'm surprised you did not stay with the Hensley as they say they are the best and are suppose to guaranteed no sway, but I could not justify the steep price so I passed.
Here is what I'm using now, it is the Equal-i-zer 4 point hitch. It works so much better I also installed The Timbren suspension enhancement system. It's not expensive I think a I paid $230 installed. I don't know how your Ford truck is for rear suspension but mine is leave spring with rubber snubbers. These are what is replaced on Chevys which are longer and when the trailer is attached to the truck the snubbers now rest on the axle to help prevent sway. This has help a bunch also.
As with any trailer you will get sway when big trucks pass not matter what. I can now tow my rig with more confidence and less effort. It's still not perfect but it works. I understand the longer the trailer the more sway is present also.
I have talked to a lot of folks on this subject and most do have some sway.
2015 35 FT V-Lite 30WRLIKS Diamond Package
2015 Chevy 2500 6.0 4:10 gearing.
Days camped in 2015--46
Days booked for 2016--60
Days camped in 2016 so far 51