Re: Matt Jefferies and NCC-1017
It's true that Khan's schematic isn't clear enough to make much sense of it onscreen. It's too far away from the camera to make out more than the illustration. I can't find the screencap on TrekCore from "Trouble" for comparison, so it's possible that it was the same schematic reused. But I don't recall at what point in the ep Scotty is looking at it.
"If you think you're brave enough to walk the path of honor, then follow me into the dragon's den."