I knew Bill Rosser, Way back then,
he took myself and a friend of mine on a tour of the pipe chambers
and the repair shop, as well as
having me push the button at the bottomof the 64 foot Diaphone, that plays it, you can feel the power, and watch the beater working through the window in it's bottom !
My friend also played the "Kimball TO in the AC, Ballroom" after getting used to the acoustic delays that are
1/2 second (appr.) for the right chamber and about 1 second from the left chamber.
One has to play Organs in huge halls, either from music or memory,
Certainly not listening to what you are playing because of the long acoustic delays.
Even though most of these two organs were not playable at the time,
the sound of them in the Halls was breathtaking !
BTW we also have lived in Florida for many years, a long ways from AC !
Best wishes, Mel