I bought two West Elm Tillary sofas a few years ago for my apartment. I loved them and had no issues. When I moved to my house, it was a different story.
In my apartment the sofas were right up against the wall, but in my house the sofas are in the middle of my living room. The top section of the sofas do not attach to the bottom--they only have a little grip on the bottom to stay in place. When anyone leaned back on the sofa, the grip did NOT keep the top in place. I had many people fall over when the top did not stay in place so I had to come up with a way to keep this from happening!
Step 1: Collect Your Tools
Step 2: Measure Wood to Size of Sofa Back and Mark Where the Bolts Should Go
Sand the edges down
Step 3: Drill Pilot Holes Into Wood and Sofa
When we drilled the pilot holes into the wood and sofa base, we did have some batting come out and get twisted but this was not a major issue. Use hex bolts to screw the wood board into the base of the sofas.