Thank you for your comment !

Yes, you're right, things go a little to fast on my landing cut. I have to add a sequence (R2 or Anakin and his belt...)

I am still working on Grievous voice and yes I want to make it close to Vader (it's not easy because the voice is already treated and to much audio processing "kill" the sound)

I've never been bothered by this moving chair because it's makes sense that, even as prisonner, Dooku let him contemplate the battle (somewhat like the Emperor did with Luke in ROTJ ) If not, why is he in a great room, on this kind of chair and in front of a large bay window, rather than in a cell or something else ?

He is not a simple prisoner, he is the Chancelor, it's not absurd to think that he be granted the privilege to contemplate the battle on a confortable chair.

You can see on this close up the control panel of the chair. He can have full access to the chair's command and still be a credible prisoner ; )

http://www.youtube.com/watch?v=02tIB-kF5a8

what do you mean by "the surfer dude Fed" ?