Out of curiosity, how were the signs inserted in the metal rings on these types of curb signs? Specifically like the one in the picture. The bottom of the metal ring has two rivets that hold the bottom bracket together but the rest of the ring is solid. If the rivets and bracket on the bottom are removed, there's no apparent way to spread the ring enough to either remove or insert a sign without distorting the curvature of the metal ring. Just curious about the process that was used to put these together. Thanks.
