3D Printer Auto-Leveling Optical Probe

Just changed the mechanical micro-switch to optical switch on the auto-leveling system in my 3D Printer. Due to the weight of probe is too light even I put on the nut to increase the weight, so I added the spring to push the probe down. I used the spring from a pen, I cut it in half then whirled it into the probe.

I printed these parts without support, 20% fill.