Actually, the V3 was based off of the actual screen used armor.
http://www.thedentedhelmet.com/f25/f...ion-3-a-22811/
From what i understand the v4 is just some more tweaks to make it closer to the info they got back then for the V3. I believ the size is the same, as they got measurements from the actual armor at C4..cant see how that would change :P
But back onto the point of this thread...FP is still super busy, and had a personal matter as well (and moving as previously mentioned) It may be a little bit before he's back on track. He usually takes a little bit to respond to e-mails, but does get back to you. Im interested in a GMH helmet,but im waiting till he is caught up for the most part and back on a normal schedule.