I installed clips onto the bottom of my sectional sofa that prevent it from separating. Which is good, because it’s been separating a lot since I installed wheels onto it.

The wheels were to make it easier to move because stuff kept falling behind it, but they worked too well. They even just slid around while locked. With all the sections clipped together it doesn’t seem to budge. The clips are the alligator style ones that you push the couch together to cinch, or lift the couch section to release.