MPCNC 525 Z Positive Endstop

I use GRBL as my controller not marlin for my MPCNC. When I home the CNC I want it to home Z first up and away from the workpiece, then x and y. I could not find any on Thingiverse that did this without losing some Z height. So I designed this tiny little part and it works surprisingly well.

It is removable and mounts with a magnet bought from your local home improvement store, and you just screw in the switch.

The magnet is a doughnut measuring 9.6mm diameter and 1.5mm thick.
You can fi