The forearm joints of the armor are located so that your forearms would need to bend. On top of that, this configuration becomes problematic when moving the arms in any way. However, if you watched the Tychus assembly video, you realize the shoulder pads are located on top of tychus's actual shoulders. Here is one last picture where the humerus is at an angle. Here, I tried it with the humerus spread far apart. Here, I've moved the bones of the arms and the legs as to make it fit the angle and positions of corresponding bits of power armor.
In this one, the skeleton is simply placed on top of the power armor. In the following diagrams, the skeleton and the marine were aligned so that the head, the pelvis, and the knees would be in the same place.
#125 Here are four pictures of a human skeleton superimposed upon a model of a marine (Tychus) in his suit.
