The thing is, why are they even listed? I think that a coaster should only be listed if it is open or was open (defunct). How do you know that a coaster could be completely knocked over beyond repair, the manufacturer made a big boo-boo, or other serious problems that prevents the coaster from being open or even being built. It could happen.
-Mike
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"Barbara Streisand and the Diamond of Xanthar Week"