The main body that is being used for this template is the same one that Shunichi Makino designed for his template for R2-D2 (however, the body was repainted to match R5-D4). The head was a reimage (and revision) of another template.
I started with the head. Here are the parts for the head. As you can see by the template, there are recessed components that you can make for the head, or just leave them as "printed texture".
This is the recessed components for the head.
All of the recessed components are assembled.
(*NOTE* As you can see, there are enough parts to make four. However, only three are needed).
Moving on to the main part of the head. I have formed the top part for the head.
The top part of the head is assembled.
The recessed components are attacked.
Here is the bottom part of the head.
The top part and bottom parts are attached.
Here is the neck piece.
The neck piece is assembled and attached to the head.