Very interesting info, DJ, though I'm still not sure what you're referring to exactly. Must go watch ROTJ again soon.
Someone should repost that info on the Vader reveal thread!
Yodakiller, actually, 17" would be PERFECT!!!
I know it's a HUGE armor (even the GT), but on a full-sized 6'7" mannequin it's not that big at all. Just go to my site and look at my mannequin, which is 6'6".
I just measured my GT again and it's 15". I have always felt that the armor size would be perfect with an inch added to both sides, esp. if you make the edges curve/taper in a bit towards the chest like how it should.
However, I would not extend the sides by much where it reaches the neck/traps area though. ie., I would start with an extra 1" from each edge, and then less and less as it goes up. Hope I'm making sense.