Probe for surface scanning - CNC machine

It took me a couple of prints before I landed on the current design. To make it you obviously need a 3d printer, and in addition some hardware;

* end stop switch
* LM8UU bearing
* 8mm spring
* 6mm bolt (minimum 40mm length)
* I also thought about using a 8mm steel rod for the main part going through the bearing but ended up using a 3D printed part instead.

With some rough calculation this probe tool costed me a couple of dollars - max 3 if I also include the 2 failed design prints of t