Remix of https://www.thingiverse.com/thing:4796861 and https://www.thingiverse.com/thing:2920060.

Added openings to bottom and back for improved cooling of stepper.

Ender 3 Pro

.2mm

3 perimeters

30% infill

Prints without supports but I added them to the back circle in Prusaslicer for a cleaner print.

Fits Ender 3 / Ender 3 Pro