This is (yet another) BLTouch mount for the Ender 3.

Included is a version that also has a mount on the other side for attaching an IL series Keyence laser micrometer.

X and Y Offsets

#define X_PROBE_OFFSET_FROM_EXTRUDER -40  // X offset: -left  +right  [of the nozzle]#define Y_PROBE_OFFSET_FROM_EXTRUDER -12  // Y offset: -front +behind [the nozzle]

Probe Z Offset

I've been been using -1.65 for the probe Z offset, but this will probably be slightly different for everyone.