But if you can incorporate AT-ST's, then that'll be better as that'll really show off movement, and you won't ahve to show movement in the window. Just have it be silvery if you can.

Yes, more AT-STs! I checked the scene again, and there are 5 AT-AT as in the battle plan I posted, but only 1 AT-ST, while there should be 6 of them. And walkers are more agile so they would add he movement to the scene.

The shot of the speeders heading towards the front line has absolutely no rebels firing. You have two good shots of the turrets moving, but NOT firing... maybe you could have them start...

As stated before, it woudln't make sense to have the speeders flying straight at the AT-AT's... but if the Turrets are laying down cover fire... maybe it would work better.

Yep, rebels should fire with everything they got.

If you're adding in a turret for the explosion scene, don't forget outside of Pietts AT-AT there is a shot of the generator that lacks it as well.

That's right!

I then wonder, how did the command center get hit? Was it like one of the Star Destroyers bomb it or did an AT-AT fire at it... maybe something earlier during a lot of the explosion shots showing a hint of a large boom in the background. Then imperial troops enter the base. How'd they get there? Perhaps something in the background of a shot alluding to it too.

Yes, I always had a problem with this scene too. They (Vader and troops) enter the Echo base as if they were down on the planet with the attacking AT-ATs.

Anyway, this site http://www.theforce.net/SWTC/walkers.html has a lot of material regardig SW walkers. Could be useful.