When I asked a similar question to cncrp directly, they suggested mounting swing up trailer wheel jacks on the legs. I have not done that, but it seems doable. They did say that after moving at all, I should square up again.
I sent them a link to some heavy duty casters that recess by dialing up and down and each was dated at 500lbs. They would attach to the same place the leveling feet do. They suggested against it and instead gave the suggestion above.
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