Yes, we had Studio 43. It was film camera control on the fourth floor, next to master control. On the third floor, next to Studio 41, was Telecine--it had 35 and 16MM film projectors and a Telop machine. The second floor was TVR. At that time the film cameras were RCA Iconoscopes, later to be replaced by Vidicons with camera controls on the second floor (Vidicon Valley).
Several floors above were the first Videotape machines, maintained by Joe Geiger and supervised by John Koushouris.
Do you remember Harry Charles, Hom Young, Charlie Bergen, Bruce Meyers, and Ed Benford?
Grand Central was more than a railroad station.
Best regards and keep well,