I echo everything Gerald said, except I think he thought you meant attaching them to the chest piece, veruss the armor in general. If that is what you mean, then I agree with him. If you meant the armor in general, then this is my thought: On the issue of attaching the shoulders, if you are going for Level 2, you'll need to attach them to the armor. Otherwise, they won't sit high enough. Attaching to the armor also keeps the gap consistent as you move. Lastly, the shoulders and biceps are generally connected to each other. So, keep in mind how well the attachment points work with movement, if you do it another way.