I have two concerns;
I think the color of Vader's saber is too saturated in the shot when he is saying "-now I am the master."Maybe cut down the red a bit and make the glow around the core less opaque.
The color of the small lamps on Vader's belt are meant to be green. They look OK on the SE and Gout versions but by the time of the 2004 DVD they are blue. Can you get them back to where they are meant to be?
Otherwise I am sure things are coming along fine. Looks great!