I don't know why SP quit making the adjustable legs; they were pretty nice, if a bit heavy. But to be able to set them up for standing or sitting is pretty nice. The screw-in feet do adjust an inch or two for uneven ground, although there was a post a few years ago about using the Ikea feet for even more adjustability, and with a much larger pad, the Ikea's don't sink in sand as much.

