I have been having a few issues scaling a few of the pieces. Like the arm parts, when i scaled it to the correct size, and started to build it, the big top part was way past my elbow. I noticed that this part is longer than the rest but when you scale it is that included the extended part? like with the chest piece, when i scale it, should i just measure from the bottom of my ribs to my shoulder and does it automatically add the extra part at the top? or do i need to calculate that in?