The rails on the bottom just don't meet. Sigh, I was trying to set the patio blocks up with each vertical support bracket with a diameter at 18 ft. This is the last one and no way is it going to connect. If I pull all the connections tight I have a hard time figuring what the diameter should be to measure each one so they all match. This is on a used Lomart supposedly 18 ft pool. Maybe it's not an 18, could it be 17? or is 18 ft pool not really 18 ft?