When Richard knocked his bottom rail in it was great that the legs bent in slightly for him. This made it easy to tightly fit the top rail as it was sort of pincered in place. That didn't happen for me. I should have checked the straightness of the legs. I found they were slightly bowed out. So even after knocking them together the top rail was not nice and tight. I had to use clamps to do the dry fit so the top rail didn't fall out and get damaged.