Dry Box Mod for Core One (+) with Plexiglass Cover & Fans

This Dry Box mod for the Core One (+) filament spool recess area includes a plexiglass cover with an integrated hygrometer.  The cover attaches to the Core One’s steel frame with magnetic tape, no hinges. Two desiccant holders are mounted at the bottom of the spool recess.  The mod replaces the stock spool spindle with a Prusa Mini ball bearing spool holder.  Two quiet 40mm circulation fans are mounted inside the recess with an LED lit switch box mounted on the frame.  Two clips are included to keep the fan wires from sagging.  My dry box mod reduced the relative humidity in the spool recess by about 10 percentage points lower than the ambient air.  This mod can be made in stages, so you don’t have to make it all at once.