Manual Z Endstop for Hypercube 300

Used those for manual bed leveling on my hypercube 300. The part you screw on the bed came from Tech2C design. Use it with a m3 screw and a spring from a pen. The other part I've designed is screwed on the extrusion. I've joined the scad file if you need adjustment. You can print two of each and use the dual Z endstop feature on Marlin so that your bed stay leveled.