Review on Creality Upgraded Extruder with Capricorn Pneumatic System by Bill Wieser

It's always good to have 1-2 spares on hand should your Ender need replacements. Don't rely at all on Creality's instructions to install or disassemble them, they are in very broken English from Google Translate and their customer service is entirely Chinese/Chinese. I recommend looking for third party providers on YouTube that have great installation videos and walkthroughs, there are plenty of them. Be EXTRA careful when connecting everything together on the control panel - it's pretty easy, but you need to be 1000% sure that your cables are placed correctly and very securely. Also, make sure your hot-end thermistor wires aren't damaged and the thermistor screw isn't over-tightened. These wires are very small and thin and they control the temperature of the hot end. So if it is damaged or twisted, you could have a fire. Incident as the temperature is not measured accurately. Use Kapton tape to secure all the wires together under the fan shroud, it's heat resistant and provides an extra layer of protection for your wires.