I rebuilt the frame and I plan to use the jacks to level or raise.
The older frames used a lighter gauge frame and were barely able to handle the towing loads as evidenced by the many instances of the frame cracking at the bends in the front.
Since my trailer frame is both made from thicker tubing and that frame is reinforced with tubing from the main frame to the
fiberglass shell and that shell is bonded to it along the edges I am going to chance it.
Not only that, but I am not going to mount them at the extreme end of the frame to the back bumper.
I hope to be able to use the two jacks on one side to be able to lift the trailer enough to change a tire and not have to carry another jack.
I also hope to tame the jiggle of walking around in the middle of the night with one set at right angles to another.
I have no mounting problem at the front as I have added a solid cross member in front of the door and in front of the shell, whichever looks best.
I will have to add something aft of the wheels to have a cross member as well as space the jacks down some to clear the added plumbing drains added to the system so that I have a single point macerating pump the empty the tanks.
My plan is to first lower the nose so that the rear is raised and then level the rear since the front is a single point contact. Once the rear is leveled then raise the front with the Ultimate jack and then engage the front jacks for final trim.
The drill should make if much faster.