There is one (well, 2) basic level mistakes in the article about C. Andrew Nelson.
“His convincing performance as Vader lead to him appearing as the character very briefly in footage inserted into the 1998 special edition of The Empire Strikes Back; a scene in which Darth Vader basically gets on and off a shuttlecraft.”
Of course, it’s 1997, but he only did the Cloud City shot. The landing was from ROTJ, so it is Prowse. Naturally Sebastian Shaw was in the suit as well, and also the one black ILM guy for the lightsaber insert in ROTJ. Maybe other “secret” ones as well.