K-9's rebuild began with a sanding and filling over the first paint job. I embedded a magnet in K-9 so I could attach things such as 3d printed celery or a Starfleet commbadge.

I also moved the button panel up slightly. This kept the buttons from hitting the body and gave me room to hide a voltage regulator and Arduino Micro for the LED s

The pipe connecting the head to the neck motor was upgraded from plastic to metal. My father cut a metal tube on his work's mill based on my template.