It took me a while to figure out how to mount all the bones together. I tried elastic at first, and while this worked for the toes, it made the larger bones too floppy. I eventually used white coated electrical wire, which worked well.
This foot is going to a Podiatrist friend of mine, who is starting a new business. He is going to use it to show patients how their foot may be damaged.
Thanks for posting it, I really appreciate the file :-)
Not sure PETG