I setup an 80' round pen, used 5' high, 12' wide panels that I bought at Farm and Fleet. I've had a problem with the panels either wanting to tip in toward the center of the round pen, or tip out away from the center, creating a sort of domino affect where it affects a lot of panels on each side. The panels are connected to each other with chains top and bottom. The whole thing seems less stable than I would have imagined. Anyone have any experience with these things, maybe it's just how they are.