Harris Tower, a project of Harrisburg Chapter NRHS, was the subject of a video produced by The Burg magazine. Chapter member Dan Rapak who is on-camera did most of the work converting electro-pneumatic switching levers to computer simulation.
Hope you enjoy the video which includes some Pennsylvania Railroad scenes.
Sloan
P. S.: Full disclosure; I am a co-publisher of the magazine.
https://theburgnews....focus-restore-2