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Creality Ender 3 S1 3D Printer with Direct Drive Dual-Gear Extruder CR Touch Auto Bed Leveling and Silent Motherboard Dual Z-axis Print Size 8.6X8.6X10.6in : Amazon.ca: Industrial & Scientific
Creality Ender 3 Pro Dual Extrusion Mod | Hackaday.io
Rippels and Ghosting on Y-Axis of converted Ender 3 | Duet3D Forum
How to Install Genuine Bondtech Dual Gear Extruder Ender-3 (Upgrades) - YouTube