Ender 3 / Two Tree Bluer Dual Z-Axis modification Tutorial

Recently, I have upgraded my Two Tree Bluer to a dual z-axis system to (hopefully) get a better print result. It is a fun upgrade with a relatively low cost. I will share my experience here and hope that it might help you if you have any hesitations or questions.

STL and other mechanical parts

Two Trees Bluer and Ender 3 have a similar architecture, so we can use the modification for Ender 3 in this case. I choose this (https://www.thingiverse.com/thing:3440272) as it only required 4 parts to print which…