Simple foot for the 3018 CNC (made by a bunch of different manufacturers). You can mirror the foot to fit each of the 4 corners (in your slicer of choice). Made to slide into the aluminum extrusion (I use a dab of hot glue to keep them in place), and I use a little rubber bumper underneath them to keep it from sliding around.

Creality

Ender 3 Pro

No

Doesn't Matter

.3

40%