CR-10 S Bowden Drive with guide and filament sensing

CR-10 S Upgraded Bowden Drive with Z-Screw Guide, and filament out sensing screw.

Instead of the filament sensor being strung out on the filament and not guiding it around the screw correctly, this incorporates the Z-Screw filament guide, as well as the sensor / switch that informs the printer that filament has run out.