Just finished my Dual-Extrusion Ender 3 : r/3Dprinting
New upgrade dual z axis for ender 3 v2 : r/ender3v2
Add dual extrusion to your current 3D printer - dual switching extruder guide - YouTube
Free STL file Ender 3 V2 Filament Runout Sensor for Dual Gear Micro Swiss extruder・3D print design to download・Cults
Dual Gear Drive Extruder MK8 for Creality 3D Printer CR-10S Pro Ender 3/3 Pro/5 | eBay
Dual Extrusion on a Voxelab Aquila (or Ender 3 V2... prolly) - YouTube
Creality Ender 3 Pro Dual Extrusion Mod | Hackaday.io
Best Creality Ender 3 Dual Extruder Upgrades (Pro/V2/S1) - 3DSourced
OMG V2-S All Metal Aluminum Direct Extruder Active Dual Drive Bowden For Ender 3 Update Orbiter Titan Aero E3D MK8 H2 V6 3D Printer | Vaughan 3D Printing
This Innovative Creality Ender 3 Mod Enables Dual Extrusion Without an Additional Servo - Hackster.io
Creality Ender 3 - V2 - Dual Gear Is a Great Upgrade, Except for This One Issue... Let's Fix it! - YouTube
Voxelab Aquila Dual Extrusion (should also work on Ender 3 V2) by LilMikey | Download free STL model | Printables.com