Managed to catch the 757 at Williamsfield on US 322. Waited for roughly an hour. It was dark, cold, wet, and worth it. I mostly waited in my truck with a pepsi blanket until I heard the horn.
Nearly four years ago I witnessed the 765 pass through the same location three times when it was part of the NS steam program.
My video of the 757 leaves much to be desired. So I'll post a 765 photo at the same location.