LCA pivot wiggles

They loosen up like that over time. What you can do is put it in a vice and tighten it up so the wiggle is gone but make sure it still pivots. Then weld a strap connecting the two outer halves together to get rid of the slop. You can also run a piece of sheet metal across the whole bottom or buy those stiffening plates they sell. Hope this makes sense. I believe Jim Lusk has a video of this on youtube.