I am experiencing "Chucking" on my 3 week old Sabre 32 RCTS.
I never even heard of that term untill my dealer mentioned it to me when I called about the jerking I felt during the 30 Mile trip home.
Of course, now I that I know what to search or, I'm finding all kinds of info here....like this post.
It did improve a little after loading and is only a problem on some roads, but, it is still there.
Looks like MorRyde, TrailAir and maybe others offer products that should help, but it could be pricey trial error experiement with out a plan.
I also thought about approaching the dealer or Sabre to see if they would consider some sort of "good will" credit towards a retro fit. (It could happen!)
But in the mean any product or solution suggestions would be greatly appreciated.