Pete, just another quick question about the loose presentation of Vader. Does he sit well/steady in the seat of the chamber on his own, and how is he "held down" there, if at all?
The figure sits REALLY well in the seat of the chamber. In fact the chair "pad" itself as been sculpted with "butt" and "thigh" indents, like you would see if you sat in a really cushy chair and then got up - a "mold" of your butt would be left behind. There is nothing that physically restrains or holds the figure down unless you have the helmet armiture at the lowest level - it does "click" into place there and since that means the helmet is fully on the figures head, that does serve to hold the figure in place. I found that even with the armiture all the way up though, the figure still sits nicely in the chair, doesn't wobble, lean or fall out of the chair.
Oh, and is the figure easy to replace in the packaging once you've opened it up? I'm definitely going to open it, but the way it looks in the package is cool too, so I was wondering if it could be "stored and displayed" without any weirdness with seams in the packaging or rips/tears/dents/etc.
If you discount the base cardboard this piece can definitely be pseudo re-packaged after you open it. The outer shell plastic that forms the "top" of the chamber is REALLY thick and sturdy. So don't go cutting into it or anything - not only will you kill your hands, but you'll also ruin a really nice display piece.
In fact, the plastic shell is covering the piece on the top of my monitor at home right now - I don't have any intention on throwing away that piece of the packaging. Also since the figure comes with a "try me" type packaging the knob to raise and lower the armiture for the dome of the helmet is still accessible with the shell in place - so there's no loss to the motion of the helmet being raised or lowered.