About this 3D model

I ve made this for the Opto Endstops shipped with my Prusa Mendel Kit. These tiny Endstop PCBs have SMD light barriers and only one hole to fix. So i planed in a slot to prevent the PCB from rotating. Todo: - a wheel for the adjusting screw. - maybe print the opto bar in an other direction, because the slot for the square nut gets filled while printing horizontal.