For TJW, didn't they just use three slide film chains? I remember the RCA filmchains at WCET. There was a mechanism to throw the wheel into neutral. Every now and then, we'd load the chains and one of the engineers would do a Jack Barry imitation. I've always been curious about the lightning round mechanism from the 60s Password. Was this reloaded every game or episode? Are there any photos of this unit online? It would make an interesting coffee book on the true behind the scenes look at game shows - how did these things work? The lightning round mechanism, the turntables on TPiR, TJW and PYL slide mechanisms, etc.