Mega Zero Dual Z Axis

thingiverse

Consider my other design instead: https://www.thingiverse.com/thing:4817790 which gives you flexibility in using linear rods and LM8UU / Drylin instead of v-wheels. Remix of https://www.thingiverse.com/thing:4619622. It's the same dimensions except it has been mirrored and mounting bracket thickness reduced for wheel spacing. The original seems to have issues sitting flushed against the wheels on the Mega Zero and preventing them from spinning. There is also a motor mount spacer for the extruder side if you swap your stock Z motor and end up using an Ender 3 aluminum motor mount. For the other side that uses this Z bracket, make sure to use motor mount for the Ender 3 without this spacer.