Thanks for posting this! I've seen plenty of these and didn't see anything cool about them and place any value on them until now. Didn't know they did that...
This Polarized Display sign is one of the best things out there. You just need to start looking for the other three now to have a complete set. (I think there are only 4 different ones.)
Just got one but mine came in 2 pieces. I got the aluminum part today and the insert a couple of days ago with a purchase I made with an O member here that was a bonus. Only thing is the insert is folding in a litlle and trying to figure the best way to reattach.