Ahh! 4 makes a lot of difference but don't know if it's good or what.
Just thinking from the hip; you could use them like stabilizers after you level the trailer (l/r the f/b) and put them down as it sounds like you are implying. That would work and be more stable since the stabilizers do have some play. I've not used that kind of leveler so don't know how sturdy or firm they are.
Like stabilizers those leveling jacks would still probably need to be "tightened" from time to time as they settle. I would hesitate to use them individually on the corners to level the trailer by themselves. As has been discussed, if the trailer wasn't built for it (frame etc.) it might cause problems. They would probably work if used right but don't know if they would be any better than the Strongarms/Bal Lockarms on the stabilizers - and probably considerably more work.
You got those for CHEAP and don't blame you for wanting to try to use them. If you have the time and expertise you could try them. Heck, if they aren't better than the stabilizers put the Strongarms on them.
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