Here is some of the stuff that I have been working on in terms of visually showing the older robot.
I started making some thumbnails of general robots to try and figure out what our older robot may look like. I was experimenting with shapes and felt that blockier robots generally worked better.
I then made some robot silhouettes, this way I could keep the shape completely in mind. I think 3, 9 and 13 could possibly be developed further.