For all your Ender 4 Dual Extrusion upgrade needs. Note: It's a good idea to print all parts required for the upgrade before disassembling and rebuilding your printer. Take care when upgrading, and double check your wiring before turning on the power. I'm not respoible if you mess something up. Printed Parts List Extruder Mount ( Spool Holde ( Hotend Mount ( MKS 1.5 to Creality Ender 4 Motherboard Adapter ( 30mm to 40mm fan adapter ( Additional Printed parts (not required for the mod) Leadscrew Stabalizer( Printy McPrintface( LCD panel housing ( Leveling knobs( Purchased Parts List: New motherboard, that supports dual E Additional Stepper Additional Extruder Bowden Tube/M6 fitting Chimera Hotend (Chinese or genuine E3D Chimera, they both work) Cooling Fan (24v 50mm radial fan) 24V heater cartridge M3 bolts M5 bolts M5 2020 Extrusion T-Nuts Parts I used for my upgrade Motherboard ( 35.99$ Additional stepper ( 12.99$ Extruder ( extruder) 8.69$ (x2) I purchased two and replaced the plastic one that came with the printer. 24v Heater (Chimera kits come with 12v heater cartridges. These are not useful in this mod, as the Ender 4 supply is 24v.) ( heater cartridge&dpID=41KrrGy9eGL&preST=_SX342_QL70_&dpSrc=srch) 8.90$ NOTE: Make sure you mark your 24v cartridges, or keep them sorted from 12v cartridges you will get from Chimera kits. Do not use a 12v cartridge on a 24v system. This will blow the cartridge, and likely start a fire. Bowden Tube ( bowden&psc=1) 6.28$ Cooling Fan ( 24v) 11.49$ Chimera Hotend I used the WIINN Chimera Kit, which isnt the least expeive, but it comes with a lot of other optio for changing and rebuilding the hotend. ( 49.98$ There are other optio as far as chimera setups go, an E3D Chimera will fit in the mounts that you will need to print, there is also the cheapest chimera set I could find which is the Wangdd22 hotend on amazon Wangdd22 Chimera (purchase at your own risk) ( printer hotend) 35.99$ Total Upgrade Cost: 134.32$