When I towed an Aluminum Trailer Company 24' Stacker, they recommended not using anything as they said the trailer was balanced as such....
I have a friend who also has a 45' coach with a 24' Featherlite Trailer and he uses the WD hitch assembly.
2019 Grand Design Solitude 380FL fifth wheel
2017 40' Renegade Verona LE LTS (traded)
2018 F150 King Ranch Crew Cab Diesel