This is a 40mm fan holder with a duct that wraps around the extruder to blow down on the extruded filament and the extruded part from 3 slots located 120 degrees apart around the extruder nozzle
An adjustable spool holder to swap between different sized filament spools in an instant.
This is a remix of the Extruder Cooling from Thing:187380. The original thing doesn't fit the Simple when the XL Upgrade Kit is installed.
Extends the Printrbot Simple x-Axis
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