lynxmotion.com/images/hi-res/Lynx209.jpg
i found the image but I cant find the parts…i feet are so damn cool and it looks…f’ing awesome!
The lexan feet shown on that version of the “Lynx-209” biped were replaced by stronger aluminum ones with less tendency to flex under load.
The current part numbers are ASB-17], combined with ARF-02], as illustrated in this photo].
Edit: also, it looks as though the head of the plastic push-rivet on the lexan feet caused a bulge under the foot. A sole would be needed to smooth it out, but you’d still have a much more complex, much less rigid foot assembly.