I was watching Season 6, Episode 1 (1986) of the Woodwright's Shop, where Roy was doing an episode about wooden screws. He was standing next to a huge one, which he later confirmed was made by George. (There can't be too many of those in the world.) Here's a pic:
Roy_bigscrew.jpg

I'm curious whether the one that is in the closing sequence of all the shows is the same screw too? (It certainly looks like it.) George, you posted a photo of your screw in a press frame sitting in a warehouse. Do you know if someone built it into the structure shown? Maybe i'll just have to wait for the episode where Roy is working on that structure and see what they say.

Roy_bigscrew2.jpg