Greetings Omnial!
I can't be of much help with your question other than my intuition suggests keeping your current weight distributing hitch with one possible modification -- stepping down one size in weight distribution bars to ease the trailer's ride -- I am not certain whether that is suggested with Equal-i-zer when you tow with a heavy duty truck-based tow vehicle. I know that was the recommendation of a Reese hitch expert back during the three year time frame (1995-1998) when I towed my Airstream with a pickup -- I too have stuck with the same weight distributing hitch since I began trailering in 1980 -- the Reese Strait Line Hitch with Dual Cam Sway Control -- it has been installed on three different trailers and used with many varied tow vehicles over the years with only the weight distribution bars needing to be adjusted for rating to suit the combination involved.
The one comment that I would make is that one of the reasons that I have the Reese Strait Line Hitch with Dual Cam Sway Control is that the dealer from whom I purchased my first new trailer in 1980 equipped my new Nomad with a regular Reese Hitch with friction sway control. That setup lasted for two trips. The friction sway control was one huge headache. When you read the instructions it suggests/requires that :
- Should you encounter rain or ice/snow, stop and significantly reduce tension on the friction adjustment mechanism.
- When heavy and/or gusty winds are encountered, stop and increase the tension on the adjustment of the friction mechanism.
- When traveling around heavy truck traffic, stop and slightly increase tension on friction adjustment mechanism.
- Once any of the above conditions clears, stop and return the friction tension adjustment mechanism to your normal setting.
The final straw was my second trip with that trailer when I encountered sway. It was a completely clear, calm day, on a clear rural highway while accelerating toward the 55 MPH speed limit climbing a very gradual hill. The friction bar did nothing despite being properly adjusted and my rig did a 180 degree spin in the middle of the road when I ended up headed West when I was headed East. Luckily, no damage to tow vehicle other than a bumper guard that was torn off. The friction sway control bar was bent almost beyond recognition, and one of the trailer springs was protruding through its tire. This episode made my decision to purchase the Strait Line Hitch with Dual Cam Sway Control and I have never looked back as it has provided the weight distribution that I want, but more importantly the sway control that I need for peace mind.
Good luck with your investigation!
Kevin