"10) Father’s lightsaber
Why: Obi-Wan mentions to Luke that his father wanted him to have his lightsaber when he was old enough, but there is nothing in ROTS to suggest that. Heck, Anakin thought Luke had died along with his mother. The dialogue could be fixed slightly to accommodate this.
How: Make Obi-Wan say, “I wanted you to have this…” by using someone’s voice that sounds like Sir Alec, or cut and paste him saying, “I,” from somewhere else."
Old Ben was just up to his tricks with varying point of view. You may want to rethink some of your material on this site of yours because most everyone on here won't accept any changes in the OOT.