If you look closely, the door the Scarecrow, Tin Woodman and Cowardly Lion rescue Dorothy through isn't the same as the one Dorothy enters the Hourglass Room through. This is due to the deletion of an entire scene in which the room the heroes enter (following the sound of someone humming, "Somewhere Over The Rainbow") holds not Dorothy, but the Wicked Witch of the West! She paralyzes the heroes, then creates a false Rainbow Bridge from that room to Dorothy's. She sends a Winkie out to test it... he falls through the center of the bridge. She then magically compels our three heroes to call out to Dorothy, who runs onto the bridge... and is carried across by the magic slippers! Our friends are reunited, and (released from the witch's spell by love/the slippers, whichever) run out of the room, with the witch screaming, "Stop them!" behind them. (The scene was cut both for technical reasons... they couldn't pull off a good Rainbow Bridge... and because seeing a Winkie falling to his presumed death was considered too risky in the days of the Hays Commission.)
*****The cache you seek is micro.
*****Congrats to LT Silverfox for FTF!!!*****