the four corner legs and railings were added later, after I put that blind on top of it. They do stabilize the stand, but it actually locks to the tree, off a tree wedge and of course the ladder in the front.
This one sits on a small rise and overlooks where three deer trails cross about 40 yards in front of it. I sure took a lot of deer out of that stand. I tied a rope from one railing to the other, and that acts as a bench rest. Amazing how steady you can get up there, and for some reason the deer just don't seem to notice me in there. I have had to scare deer off at the end of the day, just to walk back out of my woods.