Avid Fox sorry for your troubles it sucks I get it but I think the easy fix is replace the Happyjack system for a Torklift and any additional problems will be in the rear view. I know the HJ system has brackets or straps that tie down to the frame as well as the bed but your connection points for the camper connect way out on the end so the flex you get (which is natural) is spread out to include the front part of the bed support.
The rear is a potential weak point also, Bolted through the bumper, really. What structural support does that have? It flexes a lot I guess. So now you have the camper rocking more than it should causing low spots front and back. Somehow you need to level out the bed to distribute the load evenly. Do you have a SRW or a dually?
Torklift as you know have rear supports that attach to the towing hitch (which is structurally engineered) and the front supports go directly to the frame and the tie down arms flex as they should but ALL the load gets distributed to the hitch and frame. To much pressure on the fasteners will put extra stress on your tie down brackets on the camper which is bad.
I also have an Af but its a 2019 990. Been hauling it around for almost 3 years on a 2019 F350 SRW CCLB 4x4 6.7L diesel XL edition truck. Installed the Torklift Tie downs with the fast guns to make it easier getting gas. Then I replaced the rear leaf springs with an 8 pack made for the truck and camper weights . Front and Rear Hellwig BR Sway bars, Airlift bags and run Toyo 35" x 12.5" x 18" tires on Method NV305hD 18" x 9" wheels. Rides like a champ. Do quite a bit of off road travels and never had any issues except spilling a beer or two.
Good luck on your issue. You'll get it.
