Yeah, everyone has a slightly different take but it's all similar. The idea is that the chest/back parts are connected, but the shoulder straps are setup to "float" as mentioned earlier. This is how the original Stormtrooper in the 1977 Star Wars movie were done. I have mine with elastic on the underside, then glued in the front, and free-float in the back. This also makes it easier to put the chest/back on.