Cool vintage documentary on building CN Tower

In the 80's I was working at an industrial supply company. I got a call from a guy who wanted a set of restaurant wheels. I had no idea what he was talking about. It turns out that one of the companies we had bought designed and made the components for some of the revolving restaurants in Canada. I believe it was driven by a 1/2 or 1 1/2 hp gear motor. The wheels were steel with some kind of rubber or urethane cover if I remember correctly.