As modifications go, this really does not amount to much but it works good. All we have to turn and adjust a leg leveler is that small square hole.
I don't know how the rest of you make the level adjustments to your pins but I get down on my hands and knees and then get the pin airborne by jacking it up with my back. That gets tiresome, so on the pin I just got and set up I added two jams nuts and one washer to the shanks of the 4 levelers.
This works like a dream. Now, if I need to tweak my play field level I can get a socket on the nut that is above the washer to raise and level the play field. And if I want to lower the play field I get an open end wrench to use on the nut that is below the washer. You don't need the washer but it makes it easier to get the wrench on the correct nut.