Are you aware of this one minor error in ROTJ, where the shadow of a prop lightsaber can be seen in a reflection? It’s when Vader is walking down the stairs of the throne room.
https://drive.google.com/file/d/1UNhUY-WmqAHhxT2F8iWS2-sNMGjR1MZz/view?usp=sharing
https://drive.google.com/file/d/1CtPqZ74doTx3aW1Y6OeXZrSrWARChfN-/view?usp=sharing