hehehehhe.....
I've learned A LOT from Brak and other hard-core board memebers.
Technically, you aren't breaking any big rules with the ESB helmet and the ROTJ suit. That combo was featured in the ROTJ SE. And it is probably the only way, so far, that you could get a 99.9% accurate suit and the ESB helmet. If you go all out ESB, be prepared for "artistic liberties." I personally wouldn't mix and match- I like the ESB scheme as a whole, and I don't really count the SE of the original trilogy. However, I could not discount the combo because it did appear in the film. So if that is what you have, go for it!! Have your cake and and eat it too!!