It's nice in theory, less so in practice based on the various reviews of the various DIY filament solutions I've seen. There are problems both with the consist

It's nice in theory, less so in practice based on the various reviews of the various DIY filament solutions I've seen. There are problems both with the consistency of the diameter of the extruded filament and the fact that each time you melt plastic it degrades significantly so that even on the second melt you have to mix in a significant fraction of new material.[1] We might get there eventually but in the meantime, people have had more success melting down waste plastics into bars/rods for use in subtractive (i.e. lathe/mill) applications. [1] https://en.wikipedia.org/wiki/Thermal_degradation_of_polymers https://en.wikipedia.org/wiki/Thermal_degradation_of_polymer...