Two extended 2040 aluminum profiles can add 15cm (5.9 inches) to any Ender 3 or Ender 3 Pro in less than 5 minutes.
A precision machined 550mm (~21.6") extended z-axis screw with the same pitch as the original screw for drop replacement.
To install, remove the consumable holder from the top of the printer, then remove the 2020 extrusion that connects the two vertical parts of the z-axis frame. Slowly pull the x-axis bracket off the printer. From underneath the printer, unscrew the four bolts that support the z-axis extrusion with the included hex wrench
Replace and bolt in place with new extrusion. Replace one at a time and align the pre-drilled holes in the elongated extrusion with the removed extrusion. Next, replace the original screw with the extended 55 cm screw and slowly slide the x-axis gantry back onto the z-axis assembly. Reconnect the upper 2020 extrusion to the two z-axis extrusions and finally install the top of the consumable holder.