MEW research to date has primarily focused on processing medical-grade poly(ε-caprolactone) (PCL) , a biodegradable polymer with a low melting point of 60°C. To keep expanding the versatility of MEW, it is essential to increase the range of processable materials . Until the recent development of filament-fed MEW 3D printers , thermally degradable polymers have been problematic to process. Our recent open-source MEW printer (termed the MEWron) allows the replacement of traditional pneumaticdriven extrusion and syringe-like reservoirs with gear-based extrusion systems and filament-based feeding.