I'm not sure how much more work is currently being done on a project I'd heard about in the past, but you might be interested in seeing if you can collaborate/learn from Open Source Ecology:
Wow nice to see the website has been updated in 2025. I followed it for years but it seemed to not get much updates.
Folks might also be interested in the Precious Plastic community which has a global network of "microfactories" built around a set of open-source machines made for recycling and reusing plastics
https://www.opensourceecology.org/