Graham, I think this is what they meant. But since I don't tuck or lock the chest plate all the way down, the "collar" does not jut out so much. But in doing so, the chest plate will be slightly higher than the back plate when viewed from the side. If the chest plate locks all the way down, the back plate will be flush with it.
Anyway, in case Yamato is revising the VF1, PLEASE PLEASE PREETTY PLEASE, MAKE ALL THE JOINTS AND STRESS BEARING AREAS IN METAL PARTS, PLEASE!
Oh before I forget. Picture credit goes to Jenius of anymoon.com