Allegheny,
Several years ago the C&O Historical Society was selling a DVD called Jim Eudaly's C&O Layout. It's an hour and 35 minutes long so it pretty much covers everything about the layout. You should check with them and see if they have any more. You can also do a search on You Tube for Jim Eudaly. There are several short videos of the layout.
Ken
Thank you Ken for the tip!
I'm a member of the C&O Historical Society for many years now. They are simply the very best. I love all of their publications especially the C&O Historical Magazine. I've saved everyone to date since my initial subscription years ago.
Its the only magazine I feel that is worth saving given the information it contains. All others I give away.