Extremely close to the end of this years Hacakay Prize I made my direct granules extruder work. See it running in a first video:

The idea is to shred waste plastics and turn the granules into something useful:

Even though I did not post many logs (something that would have eaten too much time), I definitely spend hours/week/days/months with trying things out and improving my design step by step:

...let's see what the jury thinks, if I get some extra time in the final round ;-)