The great piece of artwork above shows the idea very well, my thanks to the artist for using it but I don't know who they are.
Essentially I tried out a technique that Ron at 'From the Warp' blog demonstrated, see picture below.
The idea is simple, cut out two sections from a plain shoulder pad.
When I tried it, I cut the two sections unevenly and ended up having to cut the sections off completely. After cutting, just file the edges smooth.