This seems way too obvious to have not been discussed. Is there something in particular which makes fishing line an inappropriate material for use in a pinch roller extruder?

... we had this sometimes - flaws are the poor stiffness and the thin diameter, so you have to feed with the same speed as you print, what's really hard to realize ...

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

Did some googling.

Found this:
[forums.reprap.org]

Good brainstorm thread. Nice to see how many of the ideas being discussed have become a reality.