MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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https://www.thingiverse.com/thing:1597741 has one pushing 3mm filament at 10 mm/s probably not torque enough but maybe the big gear on this one could be reduced so it can do 4mm/s to make it spin a bit faster and still have enough oomph to make awesome remote extruders.

28BYJ-48 Extruder