Thanks for the link!The manual just says use an adjustable wrench. I don’t blame you though, I’d rather use the right size open end instead of an adjustable.
I just brought in a bottle jack, a scrap of lumber to sit on it, adjustable wrench and levels.I have a long slim piece of purple heart as a lever and a block with a couple of steps in it that allow for different heights for a fulcrum.
I put the block near the leg and use the lever on the bottom to just lift the foot, then spin it by hand. The feet don't always have the flats for a wrench.
Those instructions are funny. "Level your table using the longest level you can find." With pictures of a carpenter's level up there.