I do not like that Luke inherits a lightsaber that has been used to kill younglings, Shaak Ti and many other Jedi, so I am thinking of replacing Anakin's saber in those scenes with a red-bladed Darth Vader-saber. I know of people on other boards who bought the Anakin ROTS FX saber before the movie came out and later returned it because they were disgusted of what it had been used for.

There emerges a problem with continuity. Obi-Wan must acquire Anakin's lightsaber somehow.
The best idea (for continuity's sake) I have so far is to let Grievous capture the saber on board the Invisible Hand and let Obi-Wan get the saber on Utapau from Cody. Then I would have to paint it away from frames with Anakin wearing it and cut the scene with Anakin pointing it at Palpatine.
Another idea is to let Obi-Wan find it in Padmé's apartment. Cutting together these shots would be a challenge. At the very least I would have to insert dialogue from other movies, and I might have to insert a closeup of a fan's hands holding a replica Anakin saber.
I am also considering altering Anakin's clothing somewhat - make it darker, less brown, maybe add a chain and the larger Darth Vader belt buckle.

This would of course involve a lot of manual work, and I am not yet sure if it would be worthwhile.
What do you other people think of these changes? Would it improve the movie or not?