 I'm going to show you how to take off that plastic extruder that came with the Ender 3 V2 and replace it with the metal extruder from TH3D. Remove any filament that's going into your extruder. Pull out the C-clip here. Take off your Bowden coupler. Take that screw back out. That should allow you to pull your spring out. Take off the arm which is this screw back here. Loosen those grub screws and it'll be free like this. Take out the three screws here. Hold underneath here. Lift that up. Screw this down. So we're going to slide it down. Match the flat spot of your extruder. Slide it back into that back corner. Tighten the screw down. Squish it in and we're going to put it right in here and they just tighten right down into the stepper motor. Turn that right into the end and push this one in as far as it goes. Put that right here. Put that back on. Make sure you recalibrate your E-steps and now we have a much better extruder installed on this printer.