david weaver
On an infill plane with no adjuster, the easiest way to set the iron is to put the plane on what you want to plane (presuming you've set the cut too deep), and loosen the lever cap and then tighten it again. The iron should reset itself to zero or close to zero. You'll develop a rapport with a plane. The one I showed, I can do that, and then give it a light tap with a small steel hammer and it's just ideal for finishing a panel.

Once you have the depth set, you can adjust it laterally by tapping the side of the iron with a small hammer.

If one side of the lever cap has more grip than the other (not uncommon in old planes), put a piece of tape on the side of the bed that's loose.